Placeholder Astronomy 18 oz. Stainless Steel Water Bottle / Travel Mug | Cognitive Surplus

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Astronomy 18 oz Steel Bottle

$ 39.95
9 reviews
Item is in stock Only 0 left in stock Item is out of stock Item is unavailable
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Fill this flask with some piping hot mulled cider, grab a blanket and your telescope, and alight for an evening of stargazing. Sit down to a morning astronomy lecture or let this flask inspire you to keep seeking answers to matters of spacetime.

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

••• Holiday 2023 Shipping Dates & Deadlines ••• 

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

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On USA orders over $40

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Frequently Asked Questions

Peer Reviews

Customer Reviews
5.0 Based on 9 Reviews
5 ★
100% 
9
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Filter Reviews:
MH
12/29/2022
Margaret H.
United States United States

Unique

I depend on Cognitive Surplus for unique gifts, and the are yet to disappoint! This gift was a perfect fit for the my nerdy recipient! The customer service at Cognitive Surplus is amazing. I made a mistake with my order and they immediately fix it. I am grateful!

L
07/12/2022
Layla
Canada Canada

Awesome flask

I received one of these drinkbottles as a gift and I am obsessed with everything from the design to the texture. The bottle is sturdy and I love the convenience of the handle :)

A Cognitive Surplus Customer
MT
01/14/2022
Michal T.
United States United States

Beautiful flask

I bought this as a Christmas present for my boyfriend, and he's absolutely loved it! The design is gorgeous, and the flask is well built and sturdy.

V
11/28/2021
Vanesa

MS
10/19/2021
Maddie S.

Astronomy Stainless Steel Vacuum Flask

very nice material, works very well

SC
05/02/2021
Sheila C.
United States United States

Great product

Bought this flask for an Easter present for my son. Ice doesn’t melt quickly so water stays cold; perfect for taking to class or for a workout.

L
04/04/2021
lololio

Astronomy Stainless Steel Vacuum Flask

My sister liked hers so much, I decided to get my own. It's lovely as usual, and functional!

EE
04/01/2021
Eric E.
United States United States

Cool Flask

My girlfriend loved it. Keeps temperature for a super long time and has a pleasing texture.

CH
03/27/2021
Christi H.

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