I've just found that you can buy Kuti pots on Amazon:
Pink Apple C650 Unique Quality Plastic Containers 40 g (Pack of 252)
For those not familier with Kuti Pots, Kuti's Brasserie is the leading curry house in Southampton and his takeaway's come in the best quality plastic pots that you can buy (this is agreed by anoyne in the know). The pots last for ages and can be used as lunch boxes, freezer boxes, fridge boxes and hot water bottles (yes, they are water tight). Go and order a takeaway or buy in bulk.