Sari,
Do they sell milk in cardboard - paperboard - Cartons (containers) in your country?
Like This:
They are very often
deep.
In US one quart and 2 quart (half gallon - 1.89 Liter) size.
If you can find some and wash some out now they would make for some good pots to use for now. Don't forget to poke some holes in the bottom (good use for my icepick these days.)
Save some of them up this year; for next season. Dry them with an open top and store in boxes of any kind (put some borax in the containers when you store them; it kills bugs by drying them up.)
~* Robin