Our most popular stick pen just got "moody!" The pen barrel changes color from the heat in your hands. Color changes best at room temperature. For best color change results, put "mood' items in refrigerator or freezer for 20 minutes before initial use. They feature black trim and black caps. pricing includes a one color silk-screened imprint. The medium point ink cartridge is available in black or blue ink and features a special band at the tip that keeps the refill in place and also provides additional writing support. If ink cartridge color is not specified, black will be supplied.