First, prepare a new can and wash it with water many times. If there is grease, you can wash it off with baking soda, white vinegar and toothpaste in hot water. When you are ready, draw it with a mark, as shown in the figure.

Secondly, use scissors to cut along the black lines that mark the strokes (do not cut between short black lines, but leave them as pot handles), as shown in the figure.

Secondly, leave the inside of the marker (be careful whether it is sharp after cutting)

Then, clamp the edge in with a vise (less force, otherwise it will break, so it is better to prepare more cans)

Finally, if you don't like some words or patterns on the cans, you can scrub them with 95% alcohol.