. And bonus! Forget it! Whether your pal is ringing in a new decade of life or just planning a fun night out on the town for a low-key birthday, this hat adds sweetness for their next trip around the sun. What a clever one you are!Product DetailsThis fabulously festive hat takes all the guesswork out of bake times and flavors—it's just pure birthday fun! Plush Rainbow Birthday Cake Hat This cake's candles never flicker out, the frosting never melts, and you can enjoy the whole entire thing without feeling sick to your stomach.A perfect rainbow cake is even trickier, and it takes a lot of time and practice.