I used to live over formica and hardwood. Didn't realize how forgiving those are. Moved to granite and travertine and my clumsiness revealed itself after the first drop. That glass didn't just break, it exploded! Those surfaces will break some plastics, too, but at least you don't get the micro shards...Just went to Amazon and ordered some really nice acrylic glasses. Great great idea. No glass will be allowed in my pool. Probably should have ordered acrylic years ago; my floor is tile, and Ive been horrified that if I drop a glass, Ill be picking up tiny shards for the next 5 years. Great idea!!