Shatterproof DURA-SIP: Don't crash the party! Never worry about breakage again with Dura-Sip. This durable drink ware line is shatterproof, and a great alternative to acrylic. Imagine a bar stocked with dependable drink ware that that looks like fancy glass, but is dishwasher-safe. Our wine glasses and tumblers are so strong you can stand on them, bounce them, bend them - even shoot them. Yes, they are bullet proof - the ultimate party ware! Made of Eastman Tritan, shatterproof Dura-Sip can withstand the high heat of commercial dishwashers, so it's not prone to crack, cloud, or craze like acrylic.