Hi, Linea Valentina was a "commercial collection" for Adriano Dalla Valentina, a very very good master glassmaker.
These kind of small bottles, tumbles, dishes (and other small items) were very popular.
They are well made, with glass canes and filigree and a kind of pretty simple "roll up" technique. But, due to they are mass produced, their pricing were very reasonable.
I sold so, so many of them...