John George, also known as John Hardy, had been on holiday in Alicante when he was reported missing in December.
Currently, the upmarket grocer requires myWaitrose members to buy something before they can claim their free drink.
The criminal investigation into the alleged abduction of Alex Batty, who returned to the UK after six years abroad, has been discontinued because he and his family would not support a prosecution.
Kyle Clifford pleaded guilty to three counts of murder, one charge of false imprisonment and two counts of possession of offensive weapons.