These are simply awesome plastic Rocks glasses. Very versatile since they not only stack and nest within themselves, but can stack with other sized glasses that Tossware makes. This makes them almost fun to arrange since if you have more then just 4, you can arrange them in interesting ways and with other sized glasses from Tossware.
These are not your typical plastic gasses. They are more substantial and as long as you don't make the mistake of using an abrasive sponge on them (I'm looking at you Scotch-Brite™) they have a beautiful glass-like appearance and do not scratch easily. They hold up well, are dishwasher safe and best of all much safer to use around pool decks since they will not shatter like glass if dropped.
I think these are very giftable as well. They are high quality and versatile. Highly recommended. They are definitely not "toss-ware". They are definitely reusable for years and years.