Bike rides along the beach or snowshoeing in the backcountry—it's easy to stay hydrated on the go with the Hydro Flask 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.