Start with Make Amazing Waterslide Decals for Tumblers, Mugs, and Glasses! (28 min, Jennifer Maker), then DIY Plaid Glitter Tumblers - Full Process, Start to Finish! (+ Free Winter Decal Designs) (31 min, Jennifer Maker). All 40 lessons here are free, from the teachers' own official uploads. You'll need macrame cord, glue gun, wooden rings and dowels (about $45 of kit). The book to keep beside you: Macrame by Fanny Zedenius.