A storage bag can be helpful to carry all the beard grooming products together. However, it is not a necessity. You can even keep the items in a storage pouch. If you travel a lot and if you like to carry the entire kit with you, a storage bag can be very helpful. It will ensure that all the items are safe and at a place. It also makes the packing part easier. But, if you are planning to keep the kit in the bathroom, a storage bag might not be useful for you.