The Waterjug and glass are certainly not N.M.
I can't actually be sure of an identification here, but I would guess that it's Leerdam (Copier) from about 1936 (Verrerie catalogue or Sonoor catalogue)
The colour certainly could be Leerdam's 'grijsviolet' (grey/violet).
Because of the large number of similar glasses I will need a proper profile view of the glass for identification, along with exact measurements in mm please.
(The jugs are harder because there are very many (underdocumented) designs in the oeuvre)
I think the tumblers are unlikely since very few were made in Holland with an optic. This is a style more associated with Belgium