Marker holders in the shape of a calibration cat. There are small holes on the back of the holders in which 10x3mm magnets can be glued. This allows the marker holder to stick to a whiteboard. There is a large version which fits 8 markers and a small version which fits 6 markers. Both the small and large version also have a hollow version to be used as general purpose containers. The hollow versions have one large rectangular shape to hold various supplies, while the regular versions have small rectangular shapes designed to hold markers.