A simple, open-closed 3-sided lid with no need to cut a thin 250ml can, it is extremely well-knit, easy to rotate and easy to remove from the can. The full cover is designed in two parts. A ring that suports the three-function cover and allows simple and easy rotation of the cover. The design is tailored to the tin can and does not require any cutting of the sheet, thus preventing the possibility of injury to the tax. The first position is closed and has a simple mark to fingers with your nail. The second position is the site for reduced leakage material of 9-holes. The third position is a larger hole for increased material leakage.