Innobaby's Prepping Smart EZ Pop Freezer Trays are easy and convenient to store your homemade baby food or breast milk easily while saving space in your freezer. Conveniently freeze your homemade purees, fruits, veggies, breast milk and more in this space-saving design that won't overload your freezer. Each individual 1/2 oz section pop out easily - pops out as few or as many as you need. Our lids fit securely and allows for convenient freezer stacking trays. Lid keeps frozen homemade baby food & breast milk fresh longer. Our products are made of the highest quality materials in South Korea. Our products are BPA free, Phthalate free, lead free & PVC free making it completely safe for your baby. Our baby food storage trays come in 2 convenient sizes (1/2 oz and 3 oz). Both sizes stack on each other.