Keurig Green Mountain Inc. cut its full-year sales and profit forecasts as the company struggles to convince consumers to take up its new Keurig 2.0 brewing system, sending its shares sharply lower in extended trading. Sales of Keurig's brewers have slowed in the past two quarters due to high prices of the 2.0 brewing system, poor initial reviews and confusion over whether the new machine could still brew certain brands.