Cognitive Surplus

Gems & Minerals Stainless Steel Vacuum Flask

$ 39.95 USD

Let this flask accompany you on your next rock hunting adventure, take it to geology lecture, or park it on your desk to brighten up your work-from-home workspace. This Gems & Minerals Vacuum Flask is perfect for your favorite rock hound, jeweler, mineralogist, or natural history museum buff. Geology rocks!

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
Expedited service available

International

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

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