Instruct: Classify a given Amazon review as either positive or negative.
Query: Way too fragile

This is for the Bodum Pavina Double-Wall Thermo Glasses 15 oz.The cool factor is undeniable, but please don't get sucked into it, as these things have the thinnest glass walls I have ever seen. I picked up a set of two, and out of the box I saw that one should have wound up in the same place they put three armed sweaters and other "seconds". Bubbles in the glass and the top had a wobble in the circumference so it wasn't quite flat. But I kept them 'cause they were cool.I was using the good one and it got knocked over on the table and broke into a million pieces. I have broken my share of wine glasses, but this was exceptional.For my twenty bucks, I have seconds quality glass that I don't see making it to the spring and a pile of glass fragments.These are certainly not stronger than "normal" glass.Maybe I got a bad batch...YMMV