21oz (621mL) Standard Mouth Flex Straw Cap Q3/4 2025 It’s the first insulated sport

It’s the first insulated sport cap specifically designed to keep water in your Hydro Flask bottle ice cold

From mountain trails to morning yoga class

Honeycomb™️ Insulation for maximum temperature retention

10" Product Weight 467g (1

Packs into own pocket for easy storage and travel

21oz (621mL) Standard Mouth Flex Straw Cap Q3/4 2025 It’s the first insulated sportFlip it and sip it. A cupholder compatible water bottle with leakproof Flex Straw Cap and booteasy to fill, easy to drink. Open it up, add your ice, and flip to sip. The insulated stainless steel keeps it cold for up to 24 hours. 24 hours cold, 12 hours hot TempShield double wall vacuum insulation Dishwasher safe Leakproof when closed Pure taste, no flavour transfer Fits most cupholders Durable stainless steel BPA Free Dishwasher safe Flex Straw Cap