Retro Space 18 oz Steel Bottle

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Fill this Retro Space flask with your favorite rocket fuel and get ready to launch into your day, then refill it with an iced chai to keep you from spacing out in the afternoon. Whether you’re jetting off to a star party or settling in for an evening astronomy lecture, this flask has got you covered.

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.

The science of how it works
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!



  • BPA-free
  • Hand-wash only
  • Carbon Neutral Shipping & Operations
  • Compostable Packaging

Materials & Specifications

  • 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