First of all, these Bodum shots are beautiful.And, they do the job.However, I have bought two sets of these, the older version was blown glass, period. Wonderful. The newer version - February 2010, is blown glass, but rather than a glass seal, there is a plastic/silicone/?? plug over the hole in the bottom. Over time and many washings, this came off. Now, there is water inside the double wall:(. Looks ugly. I don't understand this. It can't save all that much to just seal it right. I give five stars to the earlier version, but only two for this.