Spray painted bottle caps, paint a tray white, arrange dry caps on dried tray, next used "acrylic water" to pour over the caps. 2 part epoxy is sold at HL & Michael's, but it is cheapest at Walmart, in Floral Dept. Follow the directions, mix the compounds and pour it on. It's self-leveling. Wait 48 hours, it cannot be disturbed at all! The acrylic hardens & is ready for use! Could use beer bottle caps (don't paint) and use for deck serving Tray!