Here is a great diy on making molds using epoxy. Specifically a great way to use your remaining epoxy from making your tumblers so there is no waste!!!
by Bright Lifes
by Srujana TV
by Rangoli & Crafts by Aashu
by Smart Gear
by Bhoang AJ
by Lan Anh Handmade
by Rong-Bahar Art