Borosil Stainless Steel Trek Bottle, 500 ml, Green.

Keeps your drink hot and cold for 24 hour
Insulated double wall vacuum with copper coating for maximum temperature retention
100 percent food grade and rust proof steel both inside and outside for safety, strength and durability (18/8 quality, Grade 304)
Condensation free exterior so your hands and bag stay dry, Cool to touch body with hot liquids and sweat proof with cold liquids
BPA and Phthalate free – all plastic parts are food grade, Non leaching and toxin free for healthy drinking