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♻️ Drink smart, live bold — the flask that fuels your day and saves the ocean!
The Ocean Bottle Brew Flask 350ml is a premium insulated travel flask made from 67% recycled stainless steel, designed to keep drinks hot for 6 hours and cold for 18 hours. Featuring a 360° leak-proof lid and dishwasher-safe construction, it combines durability with convenience. Winner of the iF Design Award 2025 and The Telegraph’s Best Reusable Coffee Cup 2024, it supports sustainability by removing 11.4 kg of ocean plastic per bottle sold and comes with a 10-year warranty.






| ASIN | B0BQWJLMJB |
| Age Range Description | Adult |
| Age range (description) | Adult |
| Base Diameter | 6.4 Centimetres |
| Best Sellers Rank | 3,424 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) 209 in Canteens & Water Bottles |
| Brand | Ocean Bottle |
| Brand Name | Ocean Bottle |
| Cap Type | Screw Cap |
| Capacity | 350 Millilitres |
| Colour | Sun Orange |
| Country Of Origin | China |
| Customer Reviews | 4.2 out of 5 stars 190 Reviews |
| EU Spare Part Availability Duration | 10 Years |
| Included Components | Bottle |
| Is the item dishwasher safe? | Yes |
| Is the item microwaveable? | No |
| Item Dimensions W x H | 6.4W x 16.8H centimetres |
| Item Type Name | water bottle |
| Item Weight | 320 Grams |
| Manufacturer | Ocean Bottle |
| Material Type | Stainless Steel |
| Model Name | Flask |
| Number of Items | 1 |
| Pattern | Solid |
| Product Care Instructions | Dishwasher safe |
| Recommended Uses For Product | Drinks |
| Recommended uses for product | Drinks |
| Special Features | Insulated, dishwasher safe, double wall, leak-proof insulated, practical |
| Special feature | Insulated, dishwasher safe, double wall , leak-proof insulated, practical |
| Theme | Sport |
| Unit Count | 1.0 count |
| With Lid | Yes |
R**N
Get one
Someone bought one of these for me and I love it, so I bought one for my wife. It will keep a drink hot for 4-6 hours, a quarter turn opens the valve at the top, lip runs all the way round so drink from any angle - ideal for having a hot drink while driving. And it doesn’t leak AT ALL, which means you can throw it on the passenger seat between slurps. The top part separates completely and it’s stainless steel inside, so it’s easy to keep clean. In short, it does everything you need it to and looks good. A bit pricey, but it’s probably going to be a lifetime purchase. I wouldn’t be without mine.
J**E
Yeti & Thermos are no match!
Moved over Thermos Stainless King & Yeti Rambler. This Ocean Bottle Drinking vessel is better than both. I know because my wife & I have had both and returned both. Ocean Bottle keeps drinks hot for 6 hours. I know because we've tested. The drinking from these Ocean cups is easy and clean. No mess, just good, easy supping. The turn tops to lock keep drinks inside with no drips or leaks. And the tops come apart in two bits for deeper cleaning. These aren't as rugged as the Yeti Rambler but they are far superior in terms of retaining heat and for overall usage. The yeti kept our coffees hot for 2 hours tops. The Thermos was better at around 4 hours but drinking from them was awful and awkward. I'm not sure what the low rating reviewers are on with their poor reviews of these Ocean Bottle vessels. They are superb, worth the money and possibly the best travel cups for coffee on the market.
P**C
Still perfect 9 months since purchase.
Keeps drinks hot for a good 6 hours (maybe longer, I've not tested) even when the outside of the bottle is really cold to the touch. It hasn't leaked at all, so perfect to put into my bag or lay down. Used everyday for coffee since my 1st purchase back in January (9months). The brew flask lid (the only lid i've tried) is good to drink from unlike many flask / reusable bottles. Dishwasher safe and hasn't faded in colour. Great fit for my cars cup holders.
S**N
Love it
Fantastic item. Just the right size for my hands . It keeps my drinks hot for hours and has been totally leak proof in my bag. Love you can change the look with different colour lids
M**T
Sub standard
I came to use my brew flask at the weekend as I was going away, I realised that the top was crooked. As it cost a lot of money and with a 10 year guarantee you would expect better. New I should have purchased from manufacturer, it would have been less money too.
L**Y
Leak proof but small
I tested this morning (on my bike) where it no doubt too a battering and it didn’t leak !! The coffee was still warm. However, it is a small size and the circumference means drying with a tea towel is difficult.
R**Y
AMAZED how hot & fresh my tea stays for hours in this!
Very pleased with this! It looks rather small but holds exactly the same as my favourite china mug so it’s obviously more capacious than it looks. I particularly like that I can use the top as a little cup - very useful as I was stunned by just how hot this little Ocean travel cup keeps my tea! It’s still scalding hot hours later but I can pour some into the top to drink as that cools quicker.
C**E
Don't buy. Poorly made.
After a year or so with this here's why they aren't worth buying: You do get a 10 year guarantee which is great, but not when you need to make a claim every 6 months. We have multiple ocean bottles and flasks, and whilst some are in daily use, they just aren't made well. I've had multiple lid pieces replaced and today my coffee has leaked all over me as the lid assembly has fallen apart again. Can't recommend at this price point at all, even with hand washing. Dread to think how long they would last using a dishwasher. Customer service is always good and replacement parts sent quickly, but it's not what you want to be doing multiple times a year. It sort of defeats the purpose of being sustainable if you're replacing most of it multiple times using couriers. I'm off to try Yeti instead.
E**.
Ingeniería puede mejorar
En general estoy satisfecho sin embargo, tengo que decir que debido a su diseño puede a veces derramarse sino lo armas o ajustas correctamente.
N**.
Keeps my cuppa hot!
My second purchase. First one leaked, but it got run through dishwasher often. Hand washing this one and zero issues. My favorite bottle and I have quite a few - this one keeps my cuppa piping hot! Plus I love this color.
N**.
Keeps Tea Hot!
Before purchasing this product, I read somewhere that this thermos does its job too well. Well, it's absolutely true. I prepare my tea at home about 6:15am and at 8:30am when I am finally ready for my first cuppa, it's HOT, like perfect HOT. I point this out because I actually have two "other" thermoses I carry, and this one is by far the BEST. If you want hots to stay hot, this is the RIGHT one for you.
K**E
Not really dishwasher safe
Love this bottle, but it stained from foods on plates when washed in the dishwasher which was really disappointing. Despite saying its dishwasher safe, I would avoid!
L**A
Doesn’t Leak😊
Great for hot and cold beverages. Keeps beverages hot and cold. Doesn’t leak in any position! Great purchase!!’
Trustpilot
1 week ago
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