If this is a belated April Fool’s, then count me as got…
Here is what the design firm says, “The first tab – labelled “1” – opens the lid only slightly but creates a concentrated level of pressure inside the can, which activates the bubbles in the beer.
This allows the user to pour their desired amount of foam into a glass, before opening the second tab, labelled “2”.
This tab opens the can’s lid to its fullest and creates a smooth and foamless flow of beer, according to Nendo.”
When I am at my beer geekiest, I might do this but on a Friday after work, heck no.