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
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Entomologist Approved!
I absolutely LOVE this thermos and the insect art adorning it! I love it so much that I have purchased 3 other thermoses for Christmas gifts. Thinking of purchasing 3 more!!!

Love this!!!!
I love everything about this thermos. The size, the texture, the design (especially). Keeps my water cold all day (if without the lid. But it’s the designs that thrills me. I am also giving them as gifts!

Bug Juice
Being in pest control, we found this product to be irresistible. Makes a terrific, unique gift. Great service and quality. Will definitely purchase from Cognitive Surplus again.

Awesome
I use it every day. Never leaks, and keeps my water nice and cold. Its super easy to clean and very high quality

great purchase!
love the quality and the design!