The Hydro Flask 32 oz Wide Mouth-Lightweight stands out from other stainless steel flasks with its innovative, lightweight design. With a weight savings of about 25 percent compared to similar models, this bottle allows for comfortable carrying without sacrificing capacitiy. The proven TempShield insulation ensures that drinks are kept cold for up to 24 hours or warm for 12 hours. The Hydro Flask is compatible with popular outdoor water filters and is built tough to withstand abuse. It is also BPA and phthalate free, ensuring healthy drinking.