Hydro Flask Standard-Mouth Flex Cap

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Built for easy-carry comfort and portability, the insulated Hydro Flask Standard-Mouth Flex Cap is made to last on any standard-mouth Hydro Flask water bottle.

  • Features

    • Recyclable polypropylene #5 is BPA-free, phthalate-free and toxin-free
    • Honeycomb Insulation™ inside cap adds additional temperature control
    • Soft, flexible thermoplastic urethane (TPU) strap has stainless steel pivots


    View all Hydro Flask Water Bottle Accessories
  • Technical Specs

    Best Use



    Recycled plastic


    1.91 inches


    2.5 ounces

  • Reviews
    131 reviews with an average rating of 4.5 out of 5 stars

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