This is a great set to have! The container and lids are well made. They feel durable and tough. The lids clamp down and seal the contents in very well. I put soup in one, closed it then turned it over to test how well it held liquids in and there wasn't a single drop to come out. It keeps left over food fresh and keeps veggies from going bad as fast. They are super easy to clean and dont become stained like plastic containers will. The variation of the sizes are very nice too. Theres a container for just about anything you need. After getting these we got rid of 90% of our plastic container. We will definitely get more of these in the future.