Off the back of the previous dram glass topic, here's the glass I had thought was a dwarf ale glass circa 1830-50
Conical bowl with slice cut panels around and lots of striations in the glass. 5.5cm diameter. 85g, 10.5cm tall. Dimple at the base of the bowl. Lots of wear to the base which is also 5.5cm diameter, with a polished out pontil, and a notable inclusion (just above the 3 o'clock position in pic 4).
And yes, photos are taken inside my fridge. Until I can get myself set up with a suitable rig for quality glass photography, it was the best thing I could think of for Paul's suggestion about light diffused through plastic