Insulated, flexible, and built to last. Bike rides along the beach or snowshoeing in the backcountry - it&';s easy to stay hydrated on the go with our Wide Mouth Flex Cap. Designed with stainless steel pivots and a flexible strap, this cap moves when you do. Plus, it&';s made with Honeycomb Insulation(TM) to keep drinks cold up to 24 hours or hot up to 12 - no matter what the weather&';s doing outside. Product Details Compatible with all Wide Mouth bottles Honeycomb Insulation(TM) 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