I have the Wuntu app which is tied to my 3 phone account. they send freebies and deals through from time to time. Recently I have had two small "Off to the Gym Kits" from Men's Society. My husband also has a 3 phone ! The kit is quite small and has a shampoo, face wash, folding toothbrush, hair wax and toothpaste. It cost £3 for postage for each.
Also from Wuntu I got a kit from Gruum pronounced Groom. Three decent sized products in that one, face wash, moisturiser, and toner I think. I also paid for postage for that around £3.95 I think