Quick change pen holder

This pen holder is designed for use with ONLY the fine-tip Sharpy markers. There is nothing on it to increase how tightly the pen is held. I found out after swapping pens a few times that some pens have a slightly different diameter. To account for this I took some clear packing tape and put one layer around the pen where the cap goes in order to create a slightly tighter fit. By using this pen holder you press the pen down into the holder till it hits the lip where the cap would go. This ensures every pen is the exact same distance from the egg when making multi layer patterns on an egg.