All designs on glasses are with Epoxy Resin. All pigments are with mica powders(used in all makeups and also food & drink safe). Our Epoxy Resin is ASTM Certified (D-4236) Epoxy (Food &Drink Safe) - All designs are made by hand and a spinning glass tumbler. *These glasses are coated multiple times due to complete glitter covering for smoothness. Glitter will not come off and can be hand washed with ease. Glasses are thick because of coatings. - Pink Multi-Color Glitter - 14oz Red Wine Glasses - Set of Two