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 world's lightest insulating material because it's 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. Dishwasher safe (max temp 40 C) Mouth is 20% wider compared to standard bottles BPA Free and recyclable Protective cap keeps nozzle clear of dirt and debris