The Genius Paint Pots 600ml Cup & Collar Set contains two hard plastic cups and two collars for containing the Genius Paint Pots flexible liners from the lid and liner sets. This allows you to mix, filter and spray without waste and mess. Genius Paint Pots are available in four sizes and are a complete system that enable painters to measure, mix, filter and spray. The lids have an integrated filter with disposable lids and liners for reduced cleaning and preparation time.