Hydro Flask Standard Flex Cap & Straw in Black

Strong yet flexible, Hydroflask's Standard Mouth Flex Straw 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 for up to 12. Pair it with any Hydroflask Standard Mouth bottle. The cap is not intended for use with carbonated beverages and hot liquids.