M&S Plant Kitchen Sweetened Soya Milk A delicious dairy alternative, this ultra-heat-treated sweetened soya drink is enriched with added calcium, iodine, vitamin D and vitamin B12. Best served chilled. Suitable for vegans. M&S Plant Kitchen offers a wide selection of flavour-packed, plant-based products that are totally delicious. Each product is made of 100% plant-based, vegan-friendly ingredients.