Thematic sets of thin-tipped liners contain liners with unique technology. The ink is classically contained in the body of the liner, but in addition, the same color is also part of the liner lid. The lids are freely compatible with all other liners in the set. Thanks to this, it is possible to mix colors indefinitely. All you have to do is put the lid of the desired color on the liner body and the paint from the lid is sucked into the tip of the liner body. The color of the liner is absorbed from the lid, so when writing, the ink sucked from the lid is primarily consumed, as soon as the ink is depleted, the liner begins to write with the color that is in the liner's body. Using this simple mechanism, you are able to write in several different colors when writing fluently (it is possible to suck several colors into the body of the liner at once). The resulting trace on the paper is perfectly matched in color, smooth and cleanly written. Liners are ergonomic, very comfortable to hold when writing. The set contains 6 markers in a plastic package.