Tea glass for at home and on the go

They are exactly what I was looking for. Lightweight (800g at lousy balance), super space-saving and stackable = I wash in the dishwasher. Brimming fits into 1/4 l liquid, since one but a distance from the edge holding so as not to pour a glass panel is less than the Standardhäferl. Refilling is called for, but I drink else more than one glass, so ok. Also worth mentioning is that the edge in some places is slightly rough, but not so bad that you would have him grind.