Bike rides along the beach or snowshoeing in the backcountry: it's easy to stay hydrated on the go with Hydro Flask 's 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? to keep drinks cold up to 24 hours or hot up to 12 no matter what the weather's doing outside.