Here in SA we drink beer in in pints (which isn't actually a pint, it's 3/4 of a pint) and schooners (which is half a pint, that is, half an imperial pint, not half an SA pint). Interstate a pint is an imperial pint. Although an SA pint everywhere else in Oz is a schooner. A schooner (that's SA schooner) everywhere else is a midi, except for Vic and Qld where it's a pot and NT where it's a handle. Oh, and ACT where it a half.
If you want to order your kids a soft drink you can ask for a butcher (small glass) unless you're interstate where you need to ask for a seven, except for Vic and WA where it's a glass.
Hope this clears it up.