original: some beverage products such as ales and stouts e.g. guinness rely on this effect to produce the ' head ' on the surface of the poured product .
simplifications: some beverages , such as ales and stouts , like guinness , rely on this effect to produce the foamy " head " on the surface of the beer after it has been poured into a glass . some drinks such as ales and stouts , guinness for example , rely on this effect to make the ' head ' on the top of the drink . ale and stout beverages , like guiness , rely on this effect to produce the ' head ' on the surface of the poured product . some beverage products one such as ales and stouts e.g . guinness -lrb- 2 -rrb- rely on this effect to produce the ' head ' on the surface of the poured product . some beverage products like ales and stouts , e.g. , guinness , depend on this effect to produce the ' head ' on the surface of the poured product . some drinks such as ales and stouts e.g. guinness use this effect to make the ' head ' on the top of the poured product . some beverage products such as ales and stouts use this effect to create the " head " on the surface of the poured product . some drinks such as ales and stouts , like guinness , use this effect to produce the ' head ' on the top of the poured drink .