I just checked anidb, and the set of six are listed as a single OVA.
However, the airing year is listed as 2002 at anidb, instead of 2001,
what I found at the studio's page, nor do they call it an OVA.
We have it listed on Box, of course.
The main character is a glass of wine, named 'Wine-Chan', the others are beer-cans, bottles etc.

The artists studio must be a cold place to work.
(It seems obvious that almost noone has seen it, except maybe Jarudin, who has seen all. Yay!)