Hydro Flask Standard Flex Cap

Strong yet flexible, the 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 drinks cold for up to 24 hours or hot up to 12.

• Compatible with all Standard Mouth bottles
• Honeycomb Insulation helps keep cold drinks cold and hot drinks hot
• Durable, stainless steel pivots allow strap to move easily
• BPA-free and phthalate-free
• Manufacturer's Lifetime Warranty