HOT 8 Hours. COLD 16 Hours.
copy of AO Wine Tumbler (Black)
12 oz double wall 18/8 stainless steel tumbler with copper vacuum insulation, stainless steel accent, clear push-on lid, and powder coated finish. The copper plated inner wall can make a difference of 9*F / 5*C over 24 hours and prevents heat from entering or exiting the tumbler by thermal radiation. HOT 8 Hours. COLD 16 Hours.