I love using the Solo 2oz plastic cups to mix and store my paint. I mixed this green and bagie almost four weeks ago, and it’s still fresh and ready to use. I did ad Golden’s Open Matte Medium to retard the drying, but the lid is airtight and does an excellent job of preserving the paint. Using pallet paper, I always wasted paint and then had to mix more paint to try and match. With the cups, preserving custom colors for the project’s duration is easy.