Japanese convenience stores and groceries also have a wide availability of bottled coffee drinks, which are typically lightly sweetened and pre-blended with milk. Bottled coffee drinks are also consumed in the United States. Deliquescent coffee concentrates are sometimes dependent in exorbitant institutional situations where coffee needs to be produced for thousands of people at the same time. It is described as having a flavor about as good as low-grade robusta coffee and costs about 10 cents a cup to produce. The machines used can advance up to 500 cups an hour, or 1,000 if the inundate is preheated.