Wiener Werkstätte Joseph Hoffman glass tumbler?

My friend has nine of these glasses which he believes are from Weiner Werkstatte and designed by Joseph Hoffman. Can anyone verify or comment?

Hi
If you go on a site called Loetz.com, I believe there decors index will show a link to Hoffman designs. It may be worth a look on there to see if you can see it?
m

its not Weiner but Wiener like in Vienna

Well-spotted - I'll tweak the title accordingly.

I had a flick through the Taschen book on the Wiener Werkstätte and whilst there are similar foliage motifs illustrated, there's nothing that matches. That said, it's not even close to a comprehensive catalogue of Hoffmann's glass.