I just started making tumblers ( This is my second) and I am encountering the same problem I had with my last. The glitter keeps traveling from bottom to top when I Large Coffee Mug in Blue Brown Rust Handmade Ceramic Single Caribou Vanilla Hazelnut Coffee Ground, Whole Bean, K Cups Amazon.com Sun's Tea Ultra Clear Glass Tea Mug Coffee Mug 16 oz (470 ml) Borosilicate Glasses w Big Handle Simple and Elegant Microwave Safe Pure Glass: Teacups BarConic Tall Flamingo Cocktail Glass 14 ounce Bodum mugs are back at Costco! I picked up this set of 4 double walled glass mugs for $25.99. They are 15.2 ounce (jumbo size). Safe for dishwasher, freezer, oven & microwave.