GU is an energy gel designed to be quickly and easily digestible so it can be eaten during endurance events, especially long distance running. It is a soft solid, like its namesake goo, and is squeezed directly into the mouth from 1.1 oz (32 g) 100 calorie (420 kJ) packets. The product is available in several different flavors such as vanilla bean, chocolate, berry, orange, banana, and plain.