Core Sample Stainless Steel Vacuum Flask

2 reviews
$ 39.95 USD

Perfect for hot days on dig sites, this Core Sample flask will make sure you've got ice cold water all day long. Take it with you next time you go fossil hunting or toss it in your bag and alight for the lab to analyze your most recent data set.

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.

Volume 18 oz / 500 mL
Width 2.75"
Height 8.75"
Opening Wide mouth
Material High-grade stainless steel
Cap Material High-grade stainless steel, silicone ring
Care Hand wash (do not wash in dishwasher)

 

Fill it with your favorite mulled hot cider or cold brew, and even if you don't get around to drinking it for hours, you can expect to find your beverage ready and waiting for you at just the right temperature. The metal cap seals tightly, so it won't leak all over your bag. 

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!

USA

Flat Rate $9.95
Orders $75+ ship for free
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International

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

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A Cognitive Surplus Customer
AF
12/17/2021
anna f.
United States United States

Perfect mug for any geo nerd :)

This mug is AMAZING. My brother (a geologist) is going to LOVE it.

JN
09/07/2021
Jade N.
United States United States

Compliments Galore

Love the design, hubby keeps it close to him at his desk after too many people complimented him on it Otherwise it’s high quality and we’ll see how long it holds up for

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