The Borosil Bolt Vacuum Flask 750ml is a mid-capacity, everyday water bottle built from 100% food-grade, rust-proof 18/8 stainless steel (Grade 304) inside and out. Its double-wall vacuum insulation with copper coating keeps drinks hot and cold for extended hours, making it a dependable companion for the office, gym, school or daily commute. The screw-type lid is leak-proof and drip-free, and the bottle's condensation-free exterior keeps your hands and bag dry even when carrying ice-cold water. A wide mouth opening makes it easy to add ice cubes or clean the bottle thoroughly, and it comfortably fits most bags and cup holders. Backed by a 1-year warranty against manufacturing defects, the Bolt 750 offers a good balance of capacity and portability for anyone who needs reliable hot-and-cold insulation through the day. The Borosil Bolt Vacuum Flask 750 is available at Girdhar Das & Sons, Varanasi.