Bonking sucks.  There is nothing worse then being in the middle of a workout or race and hitting that wall.  Essentially, bonking is caused by glycogen depletion from the muscles and liver.  This depletion occurs during continuous exercise that is sustained for long periods of time.  The best way to prevent bonking is through nutrition.  Maintaining a well-balanced, nutritious diet during the day can definitely help, but a lot of the time you need to consume calories during the workout.  Enter gels, chews, tablets, etc.  These products are designed to be convenient to take and mostly contain sugar.  Some people find these energy products difficult to digest and don’t overly enjoy their artificial demeanor.  Here are a couple alternative options for those not wanting to bonk but also not wanting to force themselves to swallow a gel mid workout: