Get a free plant pot with plants instore @ Tesco from one pound!!

In my local Tesco extra they have a big section at the front of the store with loads of plants from a pound which you get a free plant pot when you buy :)
the pots come in black, white, dark grey & purple
I bought a
6.00 orchid & got a 4.00 free plant pot,
3.00 gerbera with a 3.00 medium size free plant pot
& 1.00 fern with a 2.00 small plant pot
they also have big plants for 15.00 with a large plant pot free but i can't remember how much the pot was worth