This looks like the Harrachov version, known as Harrtil glass. Mostly designed by Milan Metelák, Maria Stáhlíková, and Milena Velíšková for Harrachov. However some Harrtil glass is also thought to have been designed by Ludvika Smrčková for, and made by, the Chřlbská glassworks.
Harrtil is made using glass fibre material which is then cased in glass. Merletto is similar, but does not, as far as I can remember, use fabric in its manufacture.