Standard Mouth Flex Cap

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The Hydro Flask Standard Mouth Flex Cap is designed for ultimate portability and easy-carry comfort. Insulated, flexible and built to last.
Mouth Diameter1.91 in / 48.5 mm
Weight2.5 oz / 70 g
Hydro Flask
  • 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
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