One 15.5 inch Happy Grumpy Birthday 30th Shot Glass Necklace. Plastic shot glass measures 2.25 inches tall and features a colorful confetti print along with age number. These green beads will keep your shot glass handy! Your 30th birthday is a big one, and everyone will want to buy you a drink. Your Happy Grumpy Birthday 30th Shot Glass Necklace will ensure that you'll always have a glass nearby. Cheers!