Lyra's Aqua Brush Duo is a dual-tip brush marker - the water-soluble colours are odour-free and non-toxic.
The fine tip can be used for detail and precise drawing, while the brush head is wide and flexible. This enables very soft brush strokes which are also clean and sharp. The nylon fibres provide excellent elasticity for use on large surfaces. Perfect for calligraphy and lettering.
They can also be used like watercolours. You just need to apply the colours to a non-porous surface such as a plastic sheet, and mix them with water to create some beautiful effects.