Wean Green Glass Baby Food Containers (Set of 4). Wean Cubes are a safe, environmentally friendly food storage alternative. We designed them with you and your baby in mind - they are durable, easy to clean, and can go everywhere you and your baby do Easy Clips. The lock system on the lids is designed for parents on the go. There are four locks that hold the lid in place, while keeping the food in and the air out. Extremely Durable. The container is made out of extremely durable glass that is designed to withstand extreme temperatures. The containers can go straight from the freezer, to the microwave, to the table to serve your precious baby. Glass is an environmentally product that is 100% recyclable. Stylish Shape. The sleek, stylish Wean Cubes are easy to clean and dishwasher safe. The glass container is designed to ensure that the food that goes inside stays fresh and pure. Airtight Seal. Wean Green's Glass Cubes are equipped with a silicone seal. The seal is designed to lessen leakage and make the container airtight. Measuring Lines. Measuring lines on the side make proper portioning easy. There's no need to buy different sizes for different stages and growing appetites. Safe Materials. Nothing to Hide! BPA, PVC, Phthalates, and Plasticizer FREE.