The Shopmium app is giving you the chance to try Costa Coffee in a can for free. They'll give you 100% cashback when you purchase one from a Co-op (in-store and online).
These coffees even have 30% less sugar than most ready to drink coffee drinks.
To claim yours for free, you'll need to have the Shopmium App. Then, purchase a qualifying product from a participating shop. Make sure you keep your receipt as you'll need it for the next step.
Then, once you've purchased, take a pic of your receipt and scan the barcode of the product. Your money will be transferred back into the account linked to your Shopmium.