How to open the can

Recentry cans are not necesasry to use the can opener because there are with tab to open.
Japanese many can's tab has just this shape.
Tab floats above top of the can to open easily.

The yakitori can.Yakitori is a Japanese popular poultry foods.

When you open the can it is easy to open having some space between tab and top for insert finger.

There was no space when the can with tab had started to sell in Japan.
I had struggled to open the can but now I can open very easy.

Mackerel can

how about your country's cans?

The pasta source can