KeaBabies 4oz Prep Glass Baby Food Jars with lids has a smart stacking design to secure jars from slipping. The bullet containers are airtight to keep the food fresh. The glass food container is leak-proof for the liquid to prevent any spills. These food-grade and safety-certified baby eating supplies are free from any chemicals. The puree containers have an easy twist-lock lids to close and open the glass jars without a hassle. The perfect homemade food storage solution for you and your baby. - Set of 6 durable & stackable 4 oz glass baby food containers   - Baby food jars with 3D non-fading measurement markings for easy portion control - Airtight and leak-proof puree container lids suitable for pureed and liquid food - Microwave, dishwasher, and freezer safe baby bullet storage - BPA, Lead, Phthalates, and PVC free baby feeding supplies