A 17ml bottle of Vallejo Model Color 887 US Olive Drab (previously labelled as Brown Violet).
Vallejo Model Color paints are widely recognised as setting the standard for acrylic paints. They come in 17ml bottles with a unique “eye-dropper” nozzle design, so that you can control exactly how much paint you use. Vallejo acrylic paints can be mixed with each other and are designed to be thinned with water. The pigments are more finely milled and more concentrated than other manufacturers, so you can use them neat or dilute them quite a lot before you lose opacity and adhesion.
Brushes can be cleaned in water.