A number of sistema products on sale at Wilko -
Picked the to-go salad bowl for 2 quid - usually 5 pounds
Lunch box for 1.6 quid - usually 3.5 pounds
They were available at the local wilko and checked with the store lady who said the deal is nationwide.
A few items also available at a good price online.
Been using these products and must say they are much better quality than the ones available for this price range.