Multi tops screw onto the mouth of any wide or regular mouth Mason jar and create an airtight seal. Each multi top lid features a spout with a leak proof cap that snaps into place. Shake and pour salad dressings, drink your favorite juice, or store granola and other dry foods all with the multi top lid. Multi tops are BPA and phthalate-free, so they're safe to store any type of food, and they're dishwasher and freezer safe.