Wide mouth for easy access with a leakproof screw cap;Each cup holds 1 oz (30 ml) and measures 1-3/5 (4.1 cm) in diameter x 3/4 (4.4 cm) deep, with an opening diameter of 1-1/2 (3.8 cm);Features a bottom clip that slides over the edge of your palette;Made of Plated Stainless Steel and weighs only 2-oz;Ideal for holding turpentine, linseed oil, and other mediums when you're painting out in the field