This is a perfect alternative or spare lid for your standard mouth Hydro Flask.
Hydro Flask says:
Strong yet flexible, our Standard Mouth Flex Cap is the perfect companion for spontaneous campouts, epic road trips, and everything in between. Made with stainless steel pivots and an easy-to-carry strap, this cap has Honeycomb Insulation™ to help keep your drinks cold for up to 24 hours or hot up to 12. Pair it with any of our Standard Mouth bottles.
This simple but highly effective insulated, screw top lid is perfect for any Hydro Flask's with a standard mouth design. The simple design still insulates your drinks and the strap makes it practical when you're on the move.
- Reviewed by Ultralight Outdoor Gear
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