why do cans of guinness have balls in them
Widget (beer) A widget is a device placed in a container of beer to manage the characteristics of the beer's head. The original widget was patented in Ireland by Guinness. The "floating widget" is found in cans of beer as a hollow plastic sphere, approximately 3 cm in diameter (similar in appearance to table tennis ball, but smaller) with at least one small hole and a seam. The "rocket widget" is found in bottles, 7 cm in length with the small hole at the bottom.[1]
Solo Cup Company In the 1970s, Hulseman's son, Robert Leo Hulseman, came up with the now-ubiquitous red Solo cup. The red Solo cups are made of thick, molded polystyrene. They are known for being able to withstand drops, easily stackable, and disposable while price accessible. Their characteristic red color may conceal the drinking contents.[5]