Here's what other sites are saying:
Keep the cold and warmth flowing longer, without having to unscrew a cap every time you sip in Hydro Flask's Insulated Sports Cap. PRODUCT FEATURES: Unique internal valve eliminates whistling sounds Easy to drink from and allows for 1-handed open and close Removable spout for easy cleaning Made from BPA-free polypropylene #5
- Appalachian Outdoors
Keep moving. Keep hydrated. Introducing the first insulated Sport Cap designed specifically for your Hydro Flask. Its ergonomic design makes it comfortable to drink from and allows for one-handed access. And the removable spout makes cleaning a breeze.
- Summit Hut
Hydro Flask Camp & Hike Standard Mouth Insulated Sport Cap SMSC. Refresh. Go. Introducing the first insulated Sport Cap designed specifically for your Hydro Flask. Unique ergonomic design and superior flow rate make this cap perfect for one-handed refreshment on the go.
Say hello to the insulated Sports Cap, designed to fit standard-mouth Hydro Flask bottles.
evo.com | Hydro Flask Water Bottles > The Hydro Flask Standard Mouth Sport Cap lets you access your liquid life one-handed and on the fly. Whether you're driving to and fro, out hiking new trails, or in the midst of a morning yoga class, this insulated, BPA- and Phthalate-Free Sport Cap makes Hydro Flask hydration easy. BPA-Free and Pthalate-Free Compatible with All Standard Mouth Bottles Insulated Design for Enhanced Temperature Protection Quiet "No Whistle" Valve | Hydro Flask Standard Mouth Sport Cap 2019