Shop Our Sassy Baby Koo Hot Deals! Cyber Monday Deal starts now! Our Koozies insulate your favorite drink to keep them hot or cold longer. Made of durable neoprene with Zig Zag stitching for maximum strength. Our Sassy Kewls Koozies conform to fit 8oz to 16 oz bottles or cans. Protect your favorite drinkware and make your drink easy to identify with a Sassy Kewl Koozie. They make great stocking stuffers!