Birds 18 oz Steel Bottle
Perfect for long days taking inventory of the museum's taxidermied bird collection or patient vigils waiting for a glimpse of an elusive specimen, this Birds Vacuum Flask will have your drink at just the right temperature whenever you're ready for it. Particularly if you're the type to get lost in your work for hours, it's nice to know that your tea won't have gone cold while you were having a moment of genius.
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.
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 | 500 mL|
|Material||High-grade stainless steel|
|Origin||Designed in Oregon, Built responsibly overseas|
|Cap Material||High-grade stainless steel, silicone ring|
|Care||Hand wash only|
Returns & Exchanges
within 30 days of purchase
On USA orders over $75
Inclusive Workplace & Eco Friendly Products
Frequently Asked Questions
Very good quality and keeps drinks cold for a long time.
Gorgeous and unique!
My daughter loves this! It's beautiful, functional, and durable. She really likes the texture of the decoration because it adds a little grip to the bottle so it's not slippery. We want about 5 more styles!
Wonderful, Beautiful, Sturdy
Amazing product, and good in lots of scenarios--I take it with me daily to class and rehearsal, and it's held up very well in my backpack.
The best water bottle!
Yes, and bought one for my best friend who is also a birder. They’re gorgeous and also keep water incredibly cold. They’re the perfect size, too!
Love the thermos
It is gorgeous and keeps things hot. Only thing is i wish it had a sippy lid so that i could drink coffee in the car