From mountain trails to morning yoga classes, our Standard Mouth Insulated Sport Cap lets you hydrate one-handed and on the fly. It’s the first insulated sport cap specifically designed to keep water in your Hydro Flask bottle ice cold, sip after sip.
Stainless steel, cup holder compatible, fits right in your pack—our largest reusable, refillable Standard Mouth insulated water bottle keeps cold drinks cold for 24 hours, hot drinks hot for up to 12, and holds enough hydration for tons of fun.
