Most people don’t drink enough water. The problem isn’t willpower — it’s that warm water that’s been sitting in a plastic bottle since 9am is just unappealing. By mid-afternoon, you’ve had a fraction of what you need, and you don’t even notice until the headache kicks in.
Since getting hold of the Thermos Icon Flip Lid Bottle, I don’t think I’ve ever drunk as much water in my day-to-day life. Ice cold water, available from the moment I wake up to the end of a long day out, completely changes the habit. As a stainless steel water bottle with straw built into the lid, it solves the two biggest reasons people give up on a reusable water bottle: warm water and faff.
I’ve been testing all four sizes of these insulated water bottles as a family — across beach days, paddleboarding, and a 30°C May bank holiday heat wave that turned into a serious endurance test for anything claiming to keep water cold. Here’s what I found.
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This post was created in paid partnership with Thermos. All opinions are my own.
At a Glance
- Build Quality
- Performance
- Accessories & Kit
- Value for Money
The Verdict
The Thermos Icon Flip Lid Bottle does exactly what it promises: it keeps water cold, it’s leakproof, and it’s easy to use. The one-handed flip lid is the standout feature — combined with up to 24 hours of cold performance, you’ve got ice cold water on demand from morning to well into the following day. The weight is the only real trade-off, and that’s the physics of serious insulation rather than a design shortcut. For families, outdoor enthusiasts, or anyone who wants reliable cold hydration at a fair price, it’s difficult to find fault.
Price Range: £22 – £30 depending on size
Sizes Available: 530ml / 710ml / 940ml / 1.2L
Colours: 5 colourways (8 on the 530ml)
Cold Performance: Up to 24 hours (16 hours for 530ml)
Warranty: 5 Years
The Thermos Icon Flip Lid Bottle is a double-walled, vacuum-insulated stainless steel hydration bottle with a one-handed flip spout and internal straw. It’s built to keep drinks cold all day, and it comes in enough sizes to suit the whole family.
Top Features of the Thermos Icon Flip Lid Bottle: An Insulated Water Bottle Built for Daily Use
The Icon Flip is packed with features that make everyday hydration easier — but it’s the combination of Thermos’s vacuum insulation technology with a well-thought-out lid design that makes this bottle stand out.
Thermos Vacuum Insulation
The double-walled, airless barrier is what makes this an insulated water bottle rather than just a reusable water bottle — it’s the heart of the design. Thermos claims it keeps drinks cold for up to 24 hours, and that’s backed by decades of the brand’s expertise in vacuum insulation technology. You drink upright through the straw rather than tipping the bottle, which also means less air exchange every time you sip — that helps maintain temperature too.
One-Handed Flip Lid
A small raised tab on the lid lets you flip the spout into position with a single finger. Push it back down, and it clips shut. The whole operation is faff free and takes less than a second. Especially useful when driving.
Hygienic Flip-Up Straw
As a water bottle with straw built directly into the lid, the straw is internal — connecting to the flip spout — so when the lid is closed, the drinking end is completely sealed off from the outside world.
Leakproof Seal
This is a genuinely leakproof water bottle when the lid is closed — it’s been in bags, on car seats, and on a paddleboard without incident. Just don’t do what I did once – leave the lid flipped open and lay the bottle on its side, it will leak – but that ones totally on me!
Carabiner-Compatible Carry Loop
The metal loop folds flat against the side of the bottle but is large enough to clip a carabiner through. That makes it compatible with D-rings on a paddleboard, attachment points on a rucksack, or the outside of a kit bag.
Non-Slip Silicone Base
A silicone pad on the base stops the bottle from sliding off smooth surfaces.
Powder Coated Matte Finish
The exterior coating is durable, resists scratches, and makes the bottle easier to grip — especially with wet hands outdoors. It also looks sleek without being flashy. The five colourway options (and eight on the 530ml) mean there’s something for everyone.
Dishwasher Safe
Top rack only, but it is dishwasher safe — which matters for everyday use. Having to hand-wash a bottle every day gets old quickly, and this removes that friction.
Five-Year Guarantee
Thermos backs these bottles with a five-year guarantee. For a product in this price range, that’s meaningful — it signals that the brand is confident in the build quality and isn’t expecting you to replace it every couple of years.
Thermos Icon Flip Lid Bottle Specifications
As a stainless steel water bottle, the Icon Flip range shares the same body and lid material across all four sizes — only the dimensions, weight, and cold performance change.
| Feature | 530ml | 710ml | 940ml | 1.2L |
|---|---|---|---|---|
| Price | £22 | £25 | £28 | £30 |
| Weight | 350g | 420g | 570g | 660g |
| Dimensions | 8 x 8 x 21cm | 8 x 8 x 24cm | 9.1 x9.1 x 25cm | 9.9 x9.9 x 29cm |
| Colourways | 8 | 5 | 5 | 5 |
| Cold Performance | Up to 16 hours | Up to 24 hours | Up to 24 hours | Up to 24 hours |
| Body Material | Stainless steel | Stainless steel | Stainless steel | Stainless steel |
| Lid Material | Stainless steel | Stainless steel | Stainless steel | Stainless steel |
| Base | Non-slip silicone | Non-slip silicone | Non-slip silicone | Non-slip silicone |
| Finish | Powder coat matte | Powder coat matte | Powder coat matte | Powder coat matte |
| Dishwasher Safe | Yes (top rack) | Yes (top rack) | Yes (top rack) | Yes (top rack) |
| Guarantee | 5 years | 5 years | 5 years | 5 years |
The 530ml is rated for up to 16 hours cold rather than the 24 hours of the larger sizes — a smaller bottle holds less liquid, so it has less thermal mass to keep cold, which is normal across insulated bottle ranges.
These bottles are noticeably heavier than a standard single-wall plastic hydration bottle of the same capacity — but that’s the trade-off for double-wall stainless construction and the insulation performance that comes with it.
My Personal Experience with the Thermos Icon Flip Lid Bottle
I got hold of all four sizes just before the late May bank holiday weekend, which turned out to be a scorcher — thirty degrees for most of it, and we were outdoors for all of it.
Size-wise, my personal favourite is the 940ml. My partner prefers the 710ml — it’s a bit more compact and she doesn’t drink quite as much water as me, so that works better for her. The 530ml has been great for the kids. On family days out we’ve been taking the 1.2L alongside my 940ml, so between us we’ve had close to two litres of ice cold water on tap all day, which in that heat made a serious difference.
I don’t think I’ve ever drunk quite so much water as I have since getting these bottles. Having an insulated water bottle that provides ice-cold water on hand around the clock just changes things. I’ve been filling the 940ml with cold water and ice multiple times a day, and even later in the afternoon in thirty degrees, it was still cold. No external condensation on the outside either, which keeps things tidy in a bag.
I’ve also replaced the glass of water I keep on my bedside table with the Thermos Icon Flip bottle. Ice cold water at three in the morning is considerably better than a lukewarm glass that’s been sitting there since midnight — and there’s no risk of knocking it over in the dark, which I’ve done more times than I’d like to admit.
We took the three smaller sizes to Turkey for a week — poolside each day and out on excursions. The kids’ 530ml was the first to pick up scuffs and marks, which was no surprise with grubby hands involved, but they came off no problem in the dishwasher.
My only real criticism is the weight. At 420g for the 710ml it’s noticeably heavier than a standard water bottle — but that’s just the nature of double-wall stainless steel construction. It’s what gives you the insulation, so it’s a trade-off I’d make every time.
If I could change one thing about the design it would be to add a small silicone sleeve around the carry loop. I tend to carry the bottle between my two middle fingers and on long days out that bare metal loop can get a bit uncomfortable when weighed down with water. A small thing — but it’s the one tweak I’d make. Otherwise, this bottle is flawless and comes highly recommend from me!
Thermos Icon Flip Lid Bottle Score Breakdown
Build Quality — 5/5
The Icon Flip is built from stainless steel inside and out, and it feels like it. There’s no flex in the body, no rattle from the lid, and the flip mechanism operates with a satisfying precision that suggests this isn’t going to loosen up over time. The powder coat finish has held up without scratching through daily use including time on a paddleboard and in backpacks. Thermos backs it with a five-year guarantee, which isn’t the kind of claim a brand makes about a bottle they’re not confident in.
Performance — 5/5
The insulation kept water noticeably cold through a 30°C heatwave. The flip spout mechanism works as advertised — one-handed, reliable, and leakproof when closed. The internal straw means you drink upright rather than tipping the bottle, which is both more practical for active use and likely contributes to maintaining temperature by reducing air exchange.
Features & Usability — 4.5/5
The combination of the one-handed flip lid, carabiner carry loop, non-slip base, and dishwasher-safe construction adds up to a bottle that’s thought through for real-world use rather than just spec sheet appeal. The range of four sizes is useful for different activities — rather than a one size fits all approach. The only compromise is weight: at 420g for the 710ml, this is meaningfully heavier than a standard plastic bottle but that’s jus the price of the insulation.
Value for Money — 4.5/5
At £22 for the 530ml up to £30 for the 1.2L, the Icon Flip sits in the mid-range of the premium hydration bottle market. Given that you’re getting a double-wall stainless steel bottle with Thermos vacuum insulation, and a five-year guarantee, the price feels well justified. You can find lighter plastic bottles for less, and you can spend considerably more on premium brands — but for what the Icon Flip does, the pricing is honest.
Thermos Icon Flip Lid Bottle Pros and Cons
Pros
- Excellent insulation in real-world heat — kept water cold through a 30°C heatwave, tested across all four sizes
- One-handed flip lid — the small raised tab and clean clip mechanism make drinking effortless
- Completely leakproof — no issues in bags, side pockets, or car seats
- Smooth spout, comfortable to drink from — noticeably gentle on the lips
- Carabiner-compatible carry loop — folds flat but large enough for a carabiner to attach to pack
- Range of sizes — four sizes from 530ml to 1.2L means the whole family can use the right size for them
- Five-year guarantee — a meaningful commitment from a brand that knows how to make insulated products
Cons
- Heavier than a standard plastic bottle — 420g for the 710ml is a noticeable step up from lightweight alternatives; worth considering if minimal pack weight is a priority
- No padding on the carry loop — the metal loop is bare steel. Carrying the bottle by the loop between your fingers for long stretches, a small silicone or rubber sleeve around it would add a bit of comfort.
Top Alternatives to the Thermos Icon Flip Lid Bottle
If the Icon Flip doesn’t quite fit your needs, here are three solid insulated water bottle alternatives available from UK retailers.
Hydro Flask 24oz Standard Mouth
The specs are very comparable — double-wall TempShield insulation, 24 hours cold, leakproof flip straw, long guarantee. Both are solid bottles that do the same job well. The main difference comes down to price: the Hydro Flask is around £35, compared to £25 for the equivalent 710ml Icon Flip. For most people, that £10 gap is hard to justify when the performance is this similar.
Klean Kanteen TKWide 32oz
Klean Kanteen’s TKWide is a step up in thermal performance — their Climate Lock double-wall vacuum insulation claims up to 66 hours cold, comfortably ahead of the Thermos’s 24-hour rating. It comes with a leakproof Twist Cap with built-in steel straw as standard, and the modular TK Closure system means all TKWide caps are interchangeable. At around £42, it’s noticeably pricier than the Icon Flip.
YETI Rambler 26oz Bottle with Straw Cap
The YETI Rambler 26oz is a genuine like-for-like rival — double-wall vacuum insulated, 18/8 stainless steel, and a colour-matched flip straw cap that’s leakproof when closed. At £40 it’s noticeably more expensive than the Icon Flip, but can also be used for hot drinks too, unlike the Icon. If you’re simply out for the best value insulated bottle with a straw, the Icon Flip wins on price.
| Thermos Icon Flip | Hydro Flask 24oz | Klean Kanteen TKWide 32oz | YETI Rambler Bottle 26oz | |
|---|---|---|---|---|
| Price (approx) | £22–£30 | £35 | £42 | £40 |
| Insulation | Double-wall vacuum | Double-wall vacuum | Double-wall vacuum | Double-wall vacuum |
| Cold Performance | Up to 24 hours | Up to 24 hours | Up to 66 hours | Not stated |
| Lid Type | Flip straw | Flip straw | Spout | Flip straw |
| Weight (comparable size) | 420g (710ml) | 440g (710ml) | 530g (946ml) | 600g (769ml) |
| Guarantee | 5 years | Lifetime | Lifetime | 5 years |
Final Thoughts
The Thermos Icon Flip Lid Bottle is a well-made, practical hydration bottle that earns its place in any outdoor kit or just life in general.
The build quality is exactly what you’d expect from a brand with over a century of insulation expertise — stainless steel inside and out, a flip lid mechanism that operates with satisfying precision, and a five-year guarantee that backs it all up. The insulation delivers, keeping water cold through a 30°C heatwave with ice still present hours later. Four sizes, a carabiner-compatible carry loop, no external condensation, dishwasher safe — it’s a thoughtfully designed bottle that covers all the bases.
But the real win is simpler than any spec: having ice cold water on hand wherever you are, all day, every day, changes how much you actually drink.
For more on getting the most from your Thermos products, read my guide to priming your Thermos flask and the full Thermos Ultimate Flask review.
Thermos Icon Flip Lid Bottle FAQ
Is the Thermos Icon Flip Lid Bottle BPA-free?
Yes — the stainless steel body is BPA-free, and the flip lid is made from BPA-free polypropylene with silicone seals.
Can you use the Thermos Icon Flip for hot drinks?
No — the Icon Flip is designed for cold drinks only. The flip straw lid is not suitable for hot liquids. If you want a Thermos bottle for hot drinks, look at their flask range instead.
How long does the Thermos Icon Flip keep water cold?
Thermos claims up to 24 hours cold for the 710ml, 940ml, and 1.2L sizes, and up to 16 hours for the 530ml. In real-world testing during a 30°C heatwave, the water stayed noticeably cold throughout the day with regular use.
Is the Thermos Icon Flip Lid Bottle leakproof?
Yes — when the flip lid is fully closed and clicked into position, the bottle is completely leakproof.
Is the Thermos Icon Flip Lid Bottle dishwasher safe?
Yes — it’s top-rack dishwasher safe. Thermos recommends the top rack to protect the powder coat finish over time.
What sizes does the Thermos Icon Flip Lid Bottle come in?
Four sizes: 530ml (£22), 710ml (£25), 940ml (£28), and 1.2L (£30). The 530ml has 8 colourways; the three larger sizes have 5 colourways each. The 530ml is rated up to 16 hours cold; the others are rated up to 24 hours.
Can you get a replacement lid for the Thermos Icon Flip?
Yes — Thermos sell replacement flip lids separately through their UK site and selected retailers, so if the lid gets damaged you don’t need to replace the whole bottle.
Is the Thermos Icon Flip suitable for kids?
Yes — the 530ml size works well for children. It’s light enough for kids to carry, the flip spout is easy to use, and it’s dishwasher safe for easy cleaning. The stainless steel construction is robust enough to handle the inevitable knocks and scuffs.
Related Guides & Reviews
The resources below cover the basics, common questions, and related kit to help you get more out of your time ooutdoors.
- Thermos Ultimate Flask Review
- The Art of Priming Your Thermos Flask (5 Simple Steps)
- Nalgene Wide Mouth Bottle Review
- The Ultimate Hiking Equipment List: Hiking Gear Checklist
- UK Camping Guide: Wild Camping, Gear & Safety Tips
About the Author
Steve Cleverdon is an outdoor adventure specialist with 15+ years of hiking, camping, and paddle boarding experience. He has conquered Europe’s toughest trails including the GR20 in Corsica, walked 3,000km solo across New Zealand, and worked professionally in the outdoors industry. Steve’s gear reviews and recommendations are based on real-world testing across four continents, from coastal waters to mountain peaks. Learn more about Steve or get in touch.
