WRWC Signature Black ~ Double-Wall Vacuum Bottlevacuum insulation is important to maintain beverage temperature change double wall construction with copper insulation means that hot liquids can remain hot up to 12 hours while colder choices can last a full 48 hours these bottles are condensation proof no sweating or slipping built to fit standard vehicle cup holders, the stainless steel sides are both scratch and fade resistant one size: 22oz (0. 65 l) spill proof design scratch and fade resistant