They're actually more durable than you'd think. They're supposedly shatter proof crystal. They are very thin and very light. I've actually knocked one out of the cabinet and onto the counter (a couple feet) and it just bounced. It was like slow motion lol. My uncle puts his in the dishwasher with no issues, but I don't put mine in. They are tricky to get the bottomed cleaned, so I wash right away. I scrub the top by hand and with soapy water in it, cover the opening and give it a good shake. I love these glasses. I think that they're stronger than a regular glass pint. But I'm also more careful with them. I don't bring my fancy glasses out during a party.