"Colorful protection.
Make your Hydro Flask your own with a colorful, durable silicone Flex Boot. Customize your look and protect against bumps and dings.
Medium boot fits 32 and 40 oz wide mouth bottles."
Leak-resistant, closable lid
Hot stays hot.
Cold stays cold.
TempShield double-wall vacuum insulation
Strong ergonomic handle
Fits most cupholders
Won't retain odor or leftover flavor
Durable stainless steel
Compatible with size Medium Press-In accessories
BPA-Free