
The offer gives customers the opportunity to buy now and get the product free next time they are in store.
The first two products will be offered in 470 stores participating in the deal until 24 November.
When a customer buys these products, they will receive a coupon offering them the free product within the following two weeks.
will then measure customer reaction to the promotion.
Tesco was the a 'Buy One Get One Free - Later' promotions.