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Item # HYF001S

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Item # HYF001S

It's long gone.

The last time you saw your water bottle's original cap, it was falling down a desert tower. Instead of searching the sands, replace it with Hydro Flask's Wide Mouth Flex Cap. Its stainless steel construction includes Honeycomb insulation to help you drinks stay cold or hot longer. The flexible loop is durable and convenient for hikes and bikes to summer concerts.

  • Water bottle cap fits Hydro Flask Wide Mouth bottles
  • Stainless steel construction with Honeycomb insulation
  • Flexible loop ideal for outdoorsy adventures

Tech Specs

stainless steel
Manufacturer Warranty:

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  • Familiarity: I've put it through the wringer

I was able to speak with the Hydro Flask reps when they came to our office, and she sold me on a few new lids to see how great the improvements had been. She was right! These lids seem much more durable and reliable than the previous lids. As always, I am a very happy Hydro Flask customer :)


    I got an extra one of these for my wide mouth bottles from Hydroflask. It's nice to have an extra around, just in case I misplace one or the other. The insulated design helps keep your beverages cold or hot, and the handle is suuuuuuuuper hardy - though I wouldn't recommend trying to hang an anvil from it to test its durability.

    Great Lid for Cold Beverages

    • Familiarity: I've used it several times

    Bought a wide mouth Hydroflask for coffee, but picked this lid up so I can use it for water as well. Like all other Hydroflask products, this is well designed, made, and ready to be used for years to come.

    Unanswered Question

    Is this stainless on the inside?

    Insulated and Leakproof

    • Familiarity: I've used it several times

    It may seem a little pricey for a lid, but it has an insulation pattern and keeps water cold noticeably longer than the basic flip-up/coffee style lid. Doesn't leak either. That's really all there is to it.


    • Familiarity: I've put it through the wringer

    These caps are durable, which is more than I can say for all the other Hydro Flask caps I've broken over the years. I've bought these as replacements for the ones that used to come on the bottle, and so far, so good.