Fantastix Brush Tip. These empty pens can be disposable or reusable and will add a whole new dimension to your artwork. Fantastix are available in two tips - pointed brush tips or rounded bullet tips and are supplied with protective caps. Fantastix pens are colouring tool or ink-ready marker that is fillable. Fibres continue throughout the barrel. Simply dip into ink and soak up into the barrel. As well as dipping the tip into ink, why not try the following: (1) dipping the tip in water before dipping in ink (2) use your ink pad colour options by pressing the tip on an ink pad (3) mixing your own combination of colours e.g. mixing a standard ink colour with a metallic ink.