I'm plumping for ............ Liskeard, Alum Bay or even Caithness - it has what I see often as Caithness colours ............. sort of bluey, purple, violet lines running through the glass. I thought Liskeard because of the very wide-flanged top rim, and lastly I thought Alum Bay due to the rather rough/broken indented pontil scar. But of course I could be way off with all of those since I'm no good at coloured glass. Whatever, the small amount of colour is used well, and makes a small piece very attractive. The ribbing around the body can be felt so not just optical.
Height is about 3.25 inches (about 8 csm.) All suggestions received gracefully, and thanks for looking.