I only use high quality glitter specially designed to be used with epoxy to give off the greatest sparkle possible. All tumblers are sealed with an FDA compliant epoxy, which creates a shiny glass-like finish that will stay that way for a long time with proper care.
All tumblers/cups are hand wash only and cannot be microwaved. Do not soak. Do Not Drop.
Stainless Steel tumbler cups keeps your cold drinks cold for up to 24 hours and your hot drinks hot for up to 8 hours.