I recently bought an "OpenBox M" painting box (see below) so that I can easily pack up and travel to any location to paint "en plein air". I squeeze out my paints in the bottom of the box and the lid has an adjustable, spring-loaded clamp to hold a canvas. The box is easily attached to a tripod to make a perfect easel with attached palette. Last week, I took advantage of a glorious sunny day and went to the cranberry bog in Carlisle, MA. For a couple hours, I painted in the shade of a huge oak tree and enjoyed a cool breeze, the sound of birds chirping, and a beautiful view.