Holding device for one or more highlighter pens

A holding device for a highlighter pen, comprising:

• (i) a holding case comprising:
• at least one channel to receive the highlighter pen, the at least one channel having a first opening at a first end of the channel and a second opening at a second end of the channel, the first opening being configured for insertion of the highlighter pen into the channel;
• a gripping unit in the channel, configured to removably grip the highlighter pen inside the channel, wherein the gripping unit comprises first threads configured to cooperate with second threads on the highlighter pen;
• at least one chamber, each chamber extending from the second end of a respective one of the at least one channel and configured to receive a tip of the highlighter pen, the chamber comprising a sealing unit configured to cooperate with the highlighter pen when the highlighter pen has traversed the sealing unit, to seal an airtight environment in which the tip of the highlighter pen is contained from an external environment;
• at least one first magnet;
• (ii) a base having at least one second magnet, such that attraction between the at least one first magnet and the at least one second magnet makes the base removably joinable to the holding case.