Glasses very like this appear on page 108 of "Kaj Franck Designer" from the Museum of Applied Arts, Helsinki:
"Image 2744 -- Glass series
Blown Glass, thin bottom, clear, several colors, Hold, 8,9,12,30 cl. In production 1955-1967"
The photo is in black and white, but the proportions look the same. They do not show the bottom, however, as your photograph does, but I think your glasses do look blown.
That's my best guess.