Snacking giant pladis has introduced four new cakes to its seasonal range. McVitie’s Merry Moments Double Choccy Crunch four-pack, McVitie’s Merry Moments Mint Chocolate Crunch four-pack, McVitie’s Penguin Merry Berry cake bars five-pack and McVitie’s Penguin Merry Mint cake bars five-pack all have an rrp of just £1.