Can I use a saddle bag to carry a snack and energy bars, and if so, what are the key considerations for choosing the right type of saddle bag for this purpose, taking into account factors such as size, weight, and accessibility on the go? How would the type of bike and riding style impact the suitability of a saddle bag for carrying snacks and energy bars, and are there any specific features or designs that would make a saddle bag more practical for this use? Would a saddle bag with a waterproof or water-resistant design be necessary for carrying snacks and energy bars, and are there any products on the market that are specifically designed for carrying food and nutrition while cycling? Are there any weight or size limits for saddle bags that are designed for carrying snacks and energy bars, and would a saddle bag need to be specifically designed for this purpose or could a general-purpose saddle bag be adapted for this use?