Lip Whistles Party Accessory (12 Pack) Plastic Put some zing in your whistle. 4 dozen per unit A great addition to your party supplies, these whistles are shaped like lips and are ready to help you liven up the celebration. 2 1/2" Just the right size to drop in your party goody bags, these plastic noisemakers make great party favors at your nexy birthday party, office celebration, family reunion and plenty more.