Sometimes certain ingredients need to be kept separate from others to avoid contamination. This is especially true when it comes to allergen-free preparation. The 2 qt Purple Allergen Free CamSquare® Container (2SFSCW441) clearly marks its contents as allergen free, making it easy to distinguish it in a pantry or freezer. Graduations are marked on the side to help with inventory management and the clear polycarbonate makes it easy to see what is inside of each of the Cambro CamSquare containers. To make things even easier, the containers are all commercial dishwasher safe and NSF listed.