20oz Bluetooth Speaker Tumblers Are Great For Crafters To Customize! They Are A Poly Coated Substrate, Which Means You Have To Place The Tumbler In A Convection Oven Or A Tumbler Heat Press. You Will Also Need Sublimation Paper, Sublimation Ink, Heat Tape Or Painter’s Tape, Scissors To Cut The Image, Measuring Tape, And Of Course The Tumbler!
