Coupon
From Tardis Wiki, the free Doctor Who reference
Aboard the Thirteenth Doctor's TARDIS, Graham O'Brien collected six coupons from the Bandohzi Herald, which were delivered to the coffee machine. They granted Team TARDIS a free holiday to Tranquility Spa. (TV: Orphan 55)
Ianto Jones owned some money-off coupons for Jubilee Pizza. (PROSE: Another Life)
