Due to the fact that the main compartment is often so big, you may be a little concerned to put something as important as your car keys in there. Luckily, almost all brands have a pocket that zips, and it is usually found on the inside label. This pocket is designed to keep items like keys, rings, and cell phones safe from being lost. There is nothing that can ruin a day at the beach more than sifting around in the sand trying to find your lost car keys.