21oz (621mL) Standard Mouth Flex Straw Cap Q3/4 2025 and the soft grip lid

and the soft grip lid seals tight and is easy to open

reusable—our 64 oz wide-mouth bottle is the flask to grab to keeps a whopping half-gallon of cold drinks cold and hot ones hot

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

Honeycomb™️ Insulation for maximum temperature retention

21oz (621mL) Standard Mouth Flex Straw Cap Q3/4 2025 and the soft grip lidFlip 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