Becoming harder to find is the Boontonware Frosted Tumblers that were sold as go-withs for melmac and melamine dinnerware by the Factory. They offered many sizes, the most popular would be the full sized iced tea tumbler, but here you will see some rare "highball" style tumblers.
|Rare highballs, almost non existent now.|
|Heavy bases accounted for more chips when dropped.|
These cups are not melamine, but a much harder plastic, which made them susceptible to stress cracks, chipping, and scratching. The heavy bases (I bet the bases weighed as much as the cups themselves) made them easy targets for dropping and as you can see, chipped quite easily.
One will never know how long these actually "lasted" in the population. Acquiring a set of pristine glasses is going to be very hard, and if you have them covet them like they were rare jewels. The ones I have listed on Etsy are from the Derek Schultz Collection and can be used for everyday drinking vessels.