21oz (621mL) Standard Mouth Flex Cap cups Keep your Hydro Flask bottles

Keep your Hydro Flask bottles

Sized for the perfect cup with a closeable

Go with the flow

Colour Last™ powder coat is durable

21oz (621mL) Standard Mouth Flex Cap cups Keep your Hydro Flask bottlesYour daily sip. Stainless steel and cupholder compatible, the reusable, refillable 21 oz Standard Mouth insulated water bottle keeps cold drinks cold for 24 hours, hot drinks hot for up to 12 hours, and holds enough hydration for hours of fun. 24 hours cold, 12 hours hot TempShield double wall vacuum insulation Leakproof when closed Pure taste, no flavour transfer Durable stainless steel Fits most cupholders BPA Free Dishwasher safe Not for use on a