The Genius Paint Pots 400ml Cup & Collar Set contains two hard plastic cups and two collars for containing the Genius Paint Pots flexible liners from the lid & 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.