I found a can with an old design during one of my recent travels... this has been modified for a long time in most countries so that when you open a can, you cannot get cut with the seperate metal pull tab anymore.
Old bad design found in Hong Kong
The recent classical design
There is another problem, in the new design the tab is moving inside the can and comes in contact with the beverage, a potential hygiene/safety issue because the cans are not that clean... I found an example in Italy where they have a solution for this: