This is a listing for a custom printed tumbler No epoxy is used on these cups, although they do have a slight shimmer. Unlike epoxy cups, you don't have to worry about them cracking if they are dropped. Like a normal metal tumbler, if they are dropped from a distance the metal can chip or dent. Also Unlike Epoxy Tumblers, These Tumblers Are: -Dishwasher Safe -Won't Fade or Yellow Over Time -Can Withstand Extreme Heat and Cold -Also, The Design is NOT Vinyl So It won't Peel, its PERMANENT.