Food grade plastic BPA free, non-toxic containers 100% airtight to keep food fresh Endlessly reusable, last for long time Transparent body, easy to identify Easy to clean, hand wash the lids One lid fits all containers NOTE: The package includes containers of different sizes as they were advertised, not just one size. They were stacked so well, which caused you thought they are only small. Once you received it, please try to pull them out one by one. The one at the bottom is the smallest 0.8L container, the top is medium and large, you need to separate them.