Handwash soap
Cien 500ml of hand wash soap in a disposable packaging 0.75GBP = 1.50GBP per litle
Molton Brown Amber Cocoon Fine Liquid Hand Wash for 300ml for 16GBP = 53GBP per litre
Simple Human lemon liquid dish soap refill, 1L for 6.99GBP = 7GBP per litre