The glasses are so special. My boyfriend had been wanting this style of glasses for a while, because of their beautiful blue color and the weight and style of the tumblers. The problem is they just won't last long because they break. It's not because of poor craftsmanship either - they seem to be made with care and love. I think the cobalt glass is just weaker. We've never put them in the dish washer, but slowly one by one, a year later we only have 3 remaining (but a pair were destroyed during a "covert" teenage party). They aren't practical. But they're so special, we're thinking about buying more.