Hint: Today is Cinco de Mayo.
Hint 2: This is not a sponge, but having one nearby can sometimes be handy.
The image is the foam on a glass of beer. What's this got to do with science, you ask? For starters, the science behind the head on a beer is really cool — Guinness uses nitrogen to assist in making that thick, gorgeous foam. And, heck, beer may have lubricated the very rise of civilization by being the main goal of domesticating grain in the Stone Age, researchers say. It would be about 11,425 years later when beer was finally put in cans.
Not that anyone will drink their beer in moderation today, but it's worth noting that (in moderation) beer can be good for your bones.