In the stomach, food tends to hang around in the stomach for different time scales depending on a variety of factors including the amount of food you have consumed, how much fat it contains, and also the acidity of the stomach.However, all food should have left the stomach within 2 to 4 hours.(approx. time spent in stomach before emptying) Liquid: Water-when stomach is empty, leaves immediately and goes into intestines, Juices-Fruit vegetables, vegetable broth - 15 to 20 minutes.Semi-liquid (blended salad, vegetables or fruits) - 20 to 30 min. Fruits: Watermelon - 20 min.digestion time.n the stomach, food tends to hang around in the stomach for different time scales depending on a variety of factors including the amount of food you have consumed, how much fat it contains, and also the acidity of the stomach.