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 insulation to keep drinks cold up to 24 hours or hot up to 12 — no matter what the weather’s doing outside.