Definitely cans of Coke, I can make out the curls of the logo really clearly. The chap at the till also scans one and takes the rest of the cans out without scanning, suggesting they were all the same and he adjusted the quantity on the total.
There's also some milk in the basket and a multibag of Skips (prawn cocktail flavour crisps). On the counter are a packaged sandwich, a packaged bap or roll of some kind, and what looks like the branding for Aero Bubbles (chocolate).
In the actual footage I can also see Starburst, Maoam, and what looks like blocks of cake wrapped in clear plastic.
There's nothing substantial here. I would have bought less than this for a sleepover when I was twelve. It's pure empty nutrition and it's definitely not cost-effective either.