Hydro Flask Hydration 21 - Keep moving - with the 621ml bottle and standard flex cap. It can be easily stored in a small shoulder bag, the side pocket of your backpack or a cup holder and has enough capacity to keep you going for hours - without unnecessary bulk.
Features:
Versatile, medium size
TempShield insulation prevents condensation and keeps drinks cold for up to 24 hours and warm for up to 12 hours
Durable construction made from high-quality 18/8 stainless steel
BPA free /Phthalate-free
Compatible with the Standard Mouth Insulated Sport Cap