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Jellyfish 18 oz Steel Bottle

$ 39.95
Item is in stock Only 0 left in stock Item is out of stock Item is unavailable

Whether you're heading out to walk on the beach or for a day of misty tide pool hunting, fill this Jellyfish Vacuum Flask with a hot drink for later and have it ready and waiting for you whenever you pause. 

With a textured design for a unique tactile experience, this flask will keep your drink hot or cold until you're ready to enjoy it.


BPA-free
Carbon Neutral Shipping & Operations
Composable Packaging

Here's how it works: the space between the inner and outer flask wall is evacuated, creating a vacuum (well, a partial vacuum anyway...). In order for heat transfer to take place from the outside world into your cold drink, or from your hot drink to the outside world, it needs nearby molecules to excite. If there aren't many molecules nearby, as is the case in a vacuum, the heat's energy can't easily be passed along, so your drink stays close to the temperature it was when you put it into the flask for a really long time. 

Simply stated, vacuums make great thermal insulation!

Volume 18 oz | 500 mL
Width 2.75"
Height 8.75"
Opening Wide mouth
Material High-grade stainless steel
Origin Designed in Oregon, Built responsibly overseas
Cap Material High-grade stainless steel, silicone ring
Care Hand wash only
USA

Flat Rate $9.95
Orders $75+ ship for free
Expedited service available

International

Shipping is available to most countries. See details at checkout.

If you're shipping to Europe, please check out our EU website for lower shipping rates and quicker delivery times.

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within 30 days of purchase

Free Shipping

On USA orders over $75

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Frequently Asked Questions

Peer Reviews

Customer Reviews
4.7 Based on 3 Reviews
5 ★
67% 
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4 ★
33% 
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Filter Reviews:
TM
08/02/2021
Taylor M.
United States United States

Love this bottle!

Purchased this bottle as a gift for my husband! It’s beautiful! We are kayak ecotour guides and he has received so many compliments from guests! It also keeps water cold during our Florida summers!

SM
05/01/2021
Seana M.
United States United States

Stainless Steel Vacuum Flask

I have bought 3 of these thermoses. I love the unique designs. Wish they came in a larger size. Gave it 4 stars because it dents easily.

TC
12/09/2020
Tracie C.
United States United States

Love it

I have flask from cognitive surplus. When I saw the new models I had to get another one. I like have the handle on the lid so I can easily carry the bottle.

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