According to the source of all truth http://en.wikipedia.org/wiki/Polypropylene even really poor quality stuff shouldnt melt until 130deg, should be 150+
H
Hi
Ikea have quite a few polypropylene square shaped tubs.
http://www.ikea.com/gb/en/catalog/products/20130133 56litres for £3
Obviously they dont state 'food grade' but there isnt much to leach out of PP with water as a solvent
I've used one as a FV with no problems
H