Home pack food storage container

This is a Nakaya Home Pack D food storage container set from Japan. The “3 in 1” means there are 3 separate containers in the set, and the label shows 250 mL each. They are nested inside one another in your photo, which is why it looks like one container. You can use them for small portions of food, chopped vegetables, fruits, sauces, snacks, baby food, side dishes and leftovers. They are especially useful for separating small portions for the fridge or meal preparation.