IDEAL FOR TRAVEL OR STUDIO - Small Metal Palette Cup is a favorite for travel artist rigs , Plein Air Artists. Urban Sketchers also love these when watercolor painting or using aqua brushes. SECURE SCREW TOP AIRTIGHT SEAL - Rubber gasket in screw top for extra secure seal, prevents evaporation and oxidation, recommend emptying daily after use and wipe or air dry with lid off to avoid rusting CLIPS TO MOST WORKSPACE - Great for folding palettes, Clip-mounted base for easily attaching to palettes, sketch pads and mounting boards A MUST FOR HAND-HELD ARTISTS - Small mouth top keeps liquid more easily contained, especially appreciated when attached to hand-held plastic or metal palettes ULTRA COMPACT SIZE - Doesnt take up too much space when clipped to your small palette, measures 1 7/8 inches wide including clip, 1 5/8 inches wide not including clip, Holds 15ml or ½ oz of liquid Pocket size Ultra Portable and Clips easily TO ALL Watercolor pads