That little pile has a sketchbook, drawing pen, travel palette, waterbrush, and paper towels. Total measurements are a mere 4.5" x 6" x 1.5". It lives in a quart size Ziploc freezer bag (not shown). It will also fit in a cargo pants pocket.
The Sketchbook and Pen

The sketchbook is a Pentalic Recycled Travelers Sketchbook, 4" x 6", with 80 sheets of smooth ivory 60 lb (100 gsm) paper. The paper will take a light watercolor wash if I'm really sparing with the water. I love the ivory paper. Makes pen and ink drawing an absolute joy.
The pen is a Wing Sung #235 Gold Crosshatch fountain pen, fine nib, loaded with Noodler's Bulletproof Black ink. The pen may be the smoothest writing fountain pen I own and it was only $5.00. Yep, just $5.00. It is now on special at isellpens.com for only $1.98.
The Palette and Paintbrush
The palette is a 3" x 4" eyeshadow compact purchased at the dollar store for a buck. I dug out all the eyeshadow and filled it with watercolor tube paints.
The tin was also bought at the dollar store for a buck. I think it was marketed as a gift card tin. Found it among all the wedding googah. It has room for the compact palette and several folded paper towels.
The waterbrush is a Niji/Kuretake mini waterbrush, 6" long capped, with a 12 mm brush tip. This is the same size tip as the medium waterbrush but with a more compact barrel.
The ubiquitous rubber band holds it all together.
The Paint
Because someone always asks, this is the paint in the palette:
Top row, L to R:
Winsor & Newton - Scarlet Lake
MaimeriBlu - Primary Red - Magenta
MB - Burnt Umber
MB - Burnt Sienna
Middle row:
W&N - New Gamboge
MB - Raw Sienna
W&N - Cerulean Blue
W&N - French Ultramarine
Bottom row:
MB - Perm Yellow Lemon
W&N - Perm Sap Green
Shinhan - Jaune Brilliant No. 2
Shinhan - Indigo
This sketch kit set up will work in just about any situation on the road. It is very simple to carry because it doesn't have a lot of bits and parts to juggle. Plus, it was cheap. That really appeals to my