Molded from premium FDA approved food & laboratory grade polypropylene. not These shot tubes are great for serving your favorite shot mix flavors, and you can re-use them later! Polypropylene tubes are tough and dishwasher safe. Although not as clear as Polystyrene, Polypropylene is durable and does not scratch as easy. Available in Neon Yellow, Neon Pink, Royal Blue, Aquamarine, and Neon Orange.