The Empty Brush follows other empty pump markers from MOLOTOW™. This means, the Empty Brush was developed according to the REFILL. EXCHANGE. MIX. concept. For this reason, the marker is not only refillable, but it also has an exchange tip, that can be bought separately. The Empty Brush is perfectly suitable for mixing and storing own color shades. The ink is soaked excellently by the means of the fibre rod and optimally emitted to the paper by the dimensionally stable, elastic brush tip. It is not only a gorgeous tool for artists, but also a sustainable alternative for children and pupils, replacing awkward watercolor boxes.