Lidl will have these 13 piece food storage container sets instore from Thursday 12/09/13 for £5.99 a set which seems pretty good.
Product Information :-
For freezing, heating up, storing and keeping food fresh
Stackable and temperature-resistant from (°C): -30 - +100
Set contains: 8 x 0.5L, 2 x 1L, 2 x 1.15L & 1 x 6.8L
Available in blue or green