I felt the need to review this item having now gone through two sets of these bowls.
I ordered these for my elderly cat who likes to eat from a more elevated place, so these would have been ideal for her.
However, after using the bowls for about a month, one developed a substantial crack around the bottom of the stem at the base of the bowl. I thought I must have knocked it or something, so accepted this and went to just using the one bowl. Shortly after, this bowl also developed a crack in the same spot.
After emailing Amazon about this they helpfully sent out a new set free of charge. After less than a month of using the new set (quite gingerly I might add so not to get another break), one of the bowls has now developed a crack in exactly the same spot as the previous two bowls. You can see and feel an obvious crack in the glass, which for cats like mine, who like to lick up every last scrap is pretty dangerous. We did also find a shard of glass on the floor. I can't say for sure it came from this, but we have no other glass items in that area so I suspect it was.
There is clearly a fault with the stems of these glasses so I would advise avoiding at all costs and I have suggested to Amazon that they discontinue this product.