Like the 16oz little brother of these, the 20oz cups are really great. I absolutely love both sizes and find that the combination of durability, ease of cleaning, and LIGHT WEIGHT factor make these winners for home.
I have dropped these when putting them into the cabinet. After hitting our tile floor, nothing happened. No crack, no chips, nothing. I was very happy about this because I prefer the 20oz as you can naturally get more liquid into them than the 16oz. Amazing how that works. ;-)
These have had several rotations through our dishwasher. Even on the hot setting, these didn't miss a beat. Everything has been great with these. I haven't had guests try them yet, but they are sure to speak to the lightweight factor of these great, high quality drink cups.