The Elite Nanofly 0-100 is able to keep your liquids hot or cold for 4 hours with an insulating coating made in Nanogel, which is the worlds lightest insulating material because its made out of 5% solid material and 95% air.Its nanopores matrix provides a drastic reduction in temperature transmission and ensures high insulation levels: up to 4 hours for cold liquids – double what the traditional commercially available thermal bottles can do.