Placeholder Fresh water Fish Travel Mug | Cognitive Surplus

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Freshwater Fish 18 oz Steel Bottle

$ 39.95
3 reviews
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Show off your new Freshwater Fish Vacuum Flask at the next watershed council meeting or fill it with hot coffee as you alight for a pre-dawn fishing adventure. Impress all your friends at the Fish and Wildlife Service or take one with you on your rounds at the fish hatchery.

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
Hand-wash only
Carbon Neutral Shipping & Operations
Compostable 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 | 530 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 $7.95
Orders $40+ ship for free
Expedited service available

International

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

If you're shipping to Europe, Asia, the Middle East, or Oceania, please check out our European 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
5.0 Based on 3 Reviews
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ML
12/05/2021
Miriam L.
United States United States

Lovely Flasks

I bought the bird flask a while ago and loved it so much that I bought a bird and a fish flasks as gifts for Christmas. Well made and attractive!

LB
06/03/2021
L B.
United States United States

Love it!

Product is exactly as advertised, the thermos works well and the pattern is really cute!

LM
01/03/2021
LAURA M.
United States United States

Buy one you won’t be sorry!

Great product! See my review under gems flask.

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