Milk with a fat content of less than 0.5%. Nestlé Slim Milk goes through ultra heat treatment to provide bacteria-free milk to its consumers. The product also goes through stringent quality cheques and can be consumed straight from the pack as no boiling is required. The sealed pack of NESTLÉ Slim Milk has a shelf life of 120 days without refrigeration. However, once opened, it must be refrigerated. .