Sainsburys are currently promoting the Persil Small and Mighty Range. This is for the 1.47L bottles but available on all types: Bio, Colour and Non Bio.
Great value 42 washes.
One cap (35ml) is enough for one wash.
Persil Small and Mighty Bio is the next generation of liquid detergent with pre-treaters. The first 2x concentrated liquid detergent packed with pre-treating agents, that bursts into action on contact with water for a really deep clean. Just one cap is enough for a whole wash load.
Small and Mighty - mighty cleaning from a smaller bottle.
Over 60% less packaging than standard Persil Liquid.