go-cup       
noun [ C ] US uk/ˈɡəʊˌkʌp/ us/ˈɡoʊˌkʌp/
 (酒水、饮料的)外卖塑料杯(纸杯)
a plastic or paper cup that you can use to take a drink away from the place where you buy it
  About one-quarter of the Quarter's bars, lounges, and restaurants don't offer go-cups. 该居民区约1/4的酒吧、酒店大堂和餐厅不提供酒水和饮料外卖。 
 Go-cups of sweet tea and sides are there for you to serve yourself.
 - More examples
 - It's illegal to walk down the street with an open can of beer, but bars offer go-cups to patrons who haven't finished their beer.
 - For breakfast on the run, try their "breakfast in a go-cup", which stacks scrambled eggs with bacon and hash browns or grits.