I use the following terms
KTC thin plastic 20 litre things that come in a cardboard box - cubies (pronounced queue-bees)
20 litre steel containers that oil comes in and normally have lots of holes spiked in the top by chefs - tins
20 and 25 litre HDPE containers that chemicals tend to come in - polys (pronounced pol-ees)
205 litre metal containers that methanol comes in - drums
1000 litre plastic things inside steel cages - IBCs
Dark waste stuff that comes out of the bottom of the bio processor - Glyc (pronounced Gliss or Glike)
Agree with most of that Jules.
I think the 20 ltr cylindrical metal containers could be called drums but perhaps qualified as "20 ltr drums". Tins, to me, have always contained baked beans and are found in the larder.
Like the name polys, but how about polycons as an abbreviation of polyethylene container?
Can't condone the use of glyc (lower case g ... we established a little while back that chemical names should not be capitalised). It smacks of text speak, the use of which is pure laziness and should be a capital offence.