The 2019 LED Flashing Mouthpieces are an absolute must for all your night life fun! These mouthpieces are excellent for Halloween, parties, raves and more! You will receive 2 mouthpieces. Each comes in their own packaging and they will make you the talk of the party as the mouthpiece flashes from red to blue to green and back again! The batteries are inside the silicone casing and the mouthpiece is activated simply by clicking it! One size fits all!