Peer Reviews
Core Sample 18 oz Steel Bottle
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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.
BPA-free
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 |
USA
Flat Rate $7.95
Orders $40+ ship for free
Expedited service available
International
Shipping is available to most countries. See details at checkout.
If you're shipping to Europe, Asia, the Middle East, or Oceania, please check out our European website for lower shipping rates and quicker delivery times.
Frequently Asked Questions
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Shipping is available to most countries. Simply select your country at checkout.
Shipping FAQIf you're shipping to Europe, please check out our EU website for lower shipping rates and quicker delivery times.
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We do our best to process and pack up orders within 1-2 business days. You will know your order has shipped when you receive tracking
information. Typically orders arrive within 1-8 days (depending on where you live) expedited shipping options are available at checkout.
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When your order arrives, open it up and take a look. If anything isn't as expected, got damaged in transit, or doesn't fit properly, let us know and we'll make it right.
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No problem! We offer full and partial refunds and exchanges. Read more here.
Further Research
Let customers speak for us
Absolutely Love It!
This is the best water bottle I’ve ever purchased. Maybe the best thing I’ve ever purchased. It keeps beverages perfectly cold, and I love when people ask me about it so I can geek out about paleontology for a few minutes.
I absolutely love my bottle. I use it regularly and the water stays cold past 24 hours.
So cute!
Sarah
Agouti Sticker
So cute, excellent size and quality.
Sooooo cool! It was bigger than I expected which was nice and substantial quality. The candle smells great and was the perfect gift for my friend working on this thesis.
Sturdy and beautiful bag!
I love this bag! It has so many of my favorite birds on it and it's sturdy too. I bought this bag as a book bag for going back and forth to the library and it's perfect. I love it and have received so many compliments already.
Perfect!
I bought this as I catch all pouch for my purse. It holds all my needs such as medications, lip, glosses Band-Aids etc. The print is so cute! I love it!!!
Amberly M.
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It's a gift
Got one last year for the grand niece and now one for the grand nephew's graduation. I also put some cash inside along with the sunglasses he left at my cottage. His sister loved hers, I'm sure he will like his.
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It is perfect. I love the texture, the cover, and the black paper. It is exactly what I needed to journal and is significantly better than traditional spiral bound notebook.
I love my water bottle so much! I get so many compliments on it!
