Was in Sainsbury's today and noticed that all variety's of the Original Source Shower Gel was on offer for £1 only! These usually retail around £2, so stock up.
These are the 250ml bottles, they smell so nice you want to put them in your mouth, although you shouldn't lol. I recommend the Lime, or if you need a bit of a wake up in the shower in the mornings try the mint one.
This is nationwide (apparently) and online also!