Made from silicone. Creates air-tight seal over bowls to carry food safely without spillage. Covers stretch to fit over different containers and are made from clear silicone to clearly identify contents. Pack size: 6cm/9cm/11cm/14cm/16cm/20cm. Suitable to use with cut fruit and vegetables. Can be used in the fridge and freezer. Wash before use. Dishwasher safe. Hand wash recommended. Dark coloured foods may stain. Made in China.