Safe & Stable Heat-Resistant Glass: These baby food jars are made from thick, premium glass that is safe, odor-resistant, and designed to be safe for use in microwaves, freezers, steamers, and dishwashers. Versatile for Storage, Heating & Serving: Use these jars to store homemade baby food in the fridge or freezer, heat servings directly in the microwave, and even serve food right from the same container, simplifying your routine. Easy to Clean & Reusable Design: The smooth glass interior is stain-resistant and easy to clean by hand or in the dishwasher. These reusable baby food containers are a and practical option for everyday use. Secure Leakproof Silicone Lid Seal: The included food-grade silicone lids create an airtight and leakproof seal. This helps keep food fresh, prevents spills in your diaper bag, and makes these jars ideal for travel or daycare. Clear Measurement Marks for Easy Portioning: Each glass baby food container features easy-to-read measurement lines (in ounces and milliliters), helping you accurately portion purees, snacks, or meals for your little one.