Hello Ilona - apologies that I'm unable to help with your glass, but just wanted to say please don't worry that your English 'is not so good' - in fact it's more than o.k. ..................... we have British people on the GMB who are often unable to write English as good as yours. Fingers crossed that someone is able to help with your request.

Your piece has an almost 'laboratory' appearance - utilitarian but at the same time artistic .............. ordinarily the shape of your glass might suggest it was made to be used as a carafe or decanter - perhaps it was - though it may be decorative only, and not intended for use.
P.S. and welcome to the GMB by the way
