A save and dry place to store your clothes, your towel or your glasses? This drybag is a very good option. Thanks to the PVC material there is no chance of any water getting in.
Another advantage of this drybag is that it could be used like a solar bag. When you put the bag in the sun, the black material absorbes the heat and heats up the water. This way you can easily fill the reservoir with the water and enjoy a hot shower.