Placeholder Brain Neuroscience Stainless Steel Flask / Insulated Travel Thermos – Cognitive Surplus

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Skeleton 18 oz Steel Bottle

$ 39.95
7 reviews
Item is in stock Only 0 left in stock Item is out of stock Item is unavailable

Impress your physical therapy clients while you enjoy a drink that says hot – or cold – all day. If you're the gifting-type, try giving one to your favorite orthopedist or osteologist as a special thank-you.

With a textured design for a unique tactile experience, this vacuum-insulated flask will keep your drink hot or cold until you're ready to enjoy it.

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

Flat Rate $9.95
Orders $75+ ship for free
Expedited service available


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

If you're shipping to Europe, please check out our EU 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 $75

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Customer Reviews
4.9 Based on 7 Reviews
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Filter Reviews:
Kaley R.
United States United States

Love this steel bottle

Beautiful print. High quality bottle. Keeps my drink the desired temperature. Love and highly recommend.

Diana M.
United States United States


So cute .! Getting more

Samantha S.
United States United States

Love it

Material seems durable and it is well made. Just wish it said whether or not you have to hand wash it or can machine wash it on the bottom so I don’t forget.

Theresa N.

Luis G.
United States United States

Love the design and structure!

As a skeleton enthusiast, I love this bottle's eerie yet sophisticated design. I really like the wide mouth cap as well as the easy to hold handle. My only minor issue is that sometimes it's tricky to screw closed completely and the cap ends up at a slight angle— which leads to a bit of a leak. Sometimes it just takes a few tries to get it closed right, so it's not a major problem. Overall, it insulates well, looks beautiful, and is super sleek and portable and I'd definitely repurchase as a replacement or a gift!

Cognitive Surplus Skeleton 18 oz Steel Bottle Review

Cognitive Surplus

I am happy to hear how much you like the bottle. I apologize for the issue with the cap. I will send out a replacement lid for you. Thanks for your support!

Briana W.
United States United States

Perfect size and beautiful design

I bought this water bottle as a gift to myself for my last semester of school and I love it. It fits perfectly in my backpack and keeps my water cold all day.

Michelle L.
United States United States


Love everything about my vacuum flask! Keeps my coffee hot! Currently I have 3 of these flasks and have a couple more on my list. Will not disappoint!

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