With the Molotow AQUA Squeeze Pen, colouring is a piece of cake! These sophisticated application tools can be easily filled with nearly all fluid inks or water (and are compatible with alcohol-based inks). By simply pushing the squeeze body, the paint flow can be regulated. These pens are even good for small artists. The brush pen tips are similar to real brushes, and have an approximate 20ml fluid capacity. The empty, refillable squeeze pens come in a set of 3.