Winsor and Newton - Cotman Water Colour Set - Field - The Cotman Field Watercolor Travel Set contains 12 Cotman halfpans and a unique cartridge system for whole & hallf pans, Cotman pocket brush, 60ml clip on water bottle designed for easy storage and use, a mixing palette with slides out trays for extended mixing on both sides, two clip-on pots for water, mediums, and/or washes. also includes thumb holes for easy carrying.