I've seen similar things from Maastricht, but I will not attempt this attribution. I have one of these in green, and one of them in red, these are loitering in the "generic Murano" section, until such time as someone finds out what they really are. They could be Reijmyre or Aseda - or even Czech.
In any case, I would describe it as a bowl, not an ashtray. Ashtrays are impossible to shift and clutter up your house, bowls are much friendlier in that respect.
Tip: to stretch the capacity of your shelves, concentrate on glass with a small footprint...