# Stainless steel classic water tumbler: water tumbler is made of
gauge 18/8 stainless steel , good rust resistance, durable and
convenient to use, easy to clean
# Vacuum insulation: classic tumblers are double walled and vacuum
insulated, by the pool, at the office, in your car, wherever -
tumbler keeps your favorite drinks icy cold or piping hot for
hours, you get additional thermal control