EXCELLENT MATERIAL: The empty plastic jars are made of food-grade PET rigid plastic, which is strong and light, not as heavy and breakable as glass. They are durable and can be washed with water but not dishwasher safe. SEALED & LEAK-PROOF: There is a layer of aluminum foil gasket inside the black lid, so that the lid can be firmly screwed on the round mouth jar without leaking, which keeps the food in the jar hygienic and fresh. LARGE CAPACITY: Clear bottles are easy to identify the…