Substance: Polymer

Leak-resistant and sturdy - Preparing meals in advance, managing diet portions, and enjoying healthy, nutritious meals on the go is incredibly easy with these robust food storage containers. Their hard plastic design guarantees durability without cracks or breaks. The leak-proof lids securely close the containers, stopping any frustrating leaks or spills in your bag or freezer.

Microwave Note - These containers are not suitable for oven use. Frozen meals should be defrosted prior to reheating. Avoid using these bento lunch boxes if the food contains excessive oil, fat, sugar, or salt. Rapid heating may cause the temperature of these foods to surpass 100C / 212F. Always ensure the lid is open when using a microwave. When heating with a 1000-watt microwave, do not exceed 80% power.

Freezer Healthy Food Storage Box - Get your meals ready and packed in advance. These containers with lids help keep your cooked meals flavorful and vibrant. IMPORTANT: Avoid forcing them into tight spaces while freezing, as they may crack. Ensure the container is thawed before taking off the lid, but a little warm water can help equalize the air pressure for easier lid removal.

Premium Material - These lunch boxes are constructed from food-safe PP material.