“This is oat milk at Asda, Co-op and Sainsbury’s,” the Money Saving Expert told viewers.
He explained the deal that is available is for Jörd oat milk, which comes in a one litre bottle.
The product usually costs between £1 and £1.80, depending on the stockist, and customers can now pick it up for no cost.
To do this, shoppers must buy the product first and they can claim the money back on the Shopmium App.
Martin continued: “You go in there and you buy it then you scan your receipt on the Shopmium App and it should give you the cashback.”