The Containers Have a Unique Strainer Nozzle To Allow Easy Pouring Of Liquid Contents. These High Quality Food Container Sets Are Re-Useable & Recyclable. They Can Easily Be Stored By Inserting Into Each Other & Creating A Neat Stack When Not In Use. These Sets Are Easy To Clean. Simply Use Warm Water & Detergent. The Silicon Seal Can Be Taken Out From The Lid, Cleaned And Then Re-Inserted Into The Lid, Ready For Use Again