Make And Store Your Own Paint Colors With Empty Paint Tubes. Have you ever worked on a Painting and wished you could preserve your mixed Paint Colors for the next time you sit down to work on it? We underStand, becaUse it has happened to us too! Creative Mark is known for providing tools to artists who enjoy creating and preserving Colors and hues, for later Use. Empty Paint Tubes are a line of the highest Quality lined aluminum Paint tubes with easy-to-open, screw-on caps. These tubes can easily be packed-up for plein air or Used regularly in a studio. 4 Sizes Available and they will hold anything from Watercolors to acrylics! Sold only in boxes. Gift these Paint tubes to any friend looking for Professional looking Storage for their everyday Painting needs!