Buy 5 get £5 off | Buy 10 get £10 off - Some items free + Delivery charge if under £40 @ Amazon Prime Now

on Amazon prime now they are running a promo on selected items of :

Buy 5 get £5 off | Buy 10 get £10 off

here are some of the cheapest items in my area (wil be different in difffenet areas):

Bottled water:
Highland Spring Sparkling Spring Water, 8x500ml £2.00

Household & homecare:
Harpic Toilet Rim Block Fresh Power 6 - Summer Breeze £1.50
Mr Sheen Multi Surface Polish Original, 300 ml £1.50
Andrex Washlets Flushable Toilet Tissue Wipes, Supreme Moist £1.25
Harpic Hygienic Toilet Rim Block Twin pack - Citrus & Grapefruit, Pack of 2x40g £1.00 (buy 10 for £10 - get £10 off )

Health & personal care:
Dove Invisible Dry 48h Anti-Perspirant Deodorant, 250ml

Pet supplies:
Whiskas 7+ Wet Cat Food for Senior Cats, Poultry Selection in Jelly, 12 Pouches (12 x 100 g) £3

Whiskas Junior Wet Cat Food for Kittens and Young Cats 2-12 Months, Poultry Selection in Gravy, 12 Pouches (12 x 100 g) £3

Whiskas 2-12 Months Kitten Pouches Poultry Selection in Jelly, 12 x 100 g £3

Gourmet Soup Chicken Variety Cat Food, 4 x 40 g £2