'Hydro Flask' Standard Flex Cap - Black

Pair this Flex Cap with any of your Hydro Flask Standard Mouth bottles and is the perfect companion for road trips, adventuresome hikes or just at home working in the yard. Keep it COLD for 24 hours or HOT for 12. SFX001 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