Bright, colorful, fun and totally unique handcrafted stoneware mug features a bird whistle on the handle that plays two notes. Made to be used, Stoneware and Food Safe Glazes that are fine for ANY type of drink, Hot or Cold. Microwave and Dishwasher safe. Original Handwork and design, lumps of clay to finished product, both cup and whistle are totally handmade by the artist. Inspired by Medieval German children's mugs, the kids could wet their whistle only when they had finished their drink! (Rules, y'know)!