Hydro Flask Standard Mouth Flex Cap

Hydro Flask Standard Mouth Flex Cap


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Flexible and Strong, introducing the new Standard Mouth Flex Cap.  Made with stainless steel pivots and an easy-to-carry strap, this new cap features enhanced honeycomb style insulation to keep your cold drinks colder and your hot drinks hotter.  

  • Compatible with all Standard Mouth bottles
  • Honeycomb insulation™ helps keep cold drinks cold and hot drinks hot
  • Durable, stainless steel pivots allow the strap to move easily
  • BPA-Free and Phthalate-Free
  • Lifetime Warranty

Q: I see the product is covered under a lifetime warranty, how do I request that?

A: Do not send the item directly back to us, however simply complete the following form at 



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