These are made of tough, lightweight, durable and unbreakable plastic, not actual "glass". The plastic is clean without blemishes or scratches, also is easy to clean. Plastic is better because shot glasses will fall and break accidentally, especially after getting drunk. Besides who wants to be swing a heavy shot glass all night for that matter, or whenever you choose to party. Because of the portability of plastic, we can take them outdoors and enjoy wine casually.