I store my soap dispenser, bathroom cup, and toilet plunger on clay plant pot bottoms. They contain the drips and the water evaporates fast. To clean, I use soap and water and rinse with vinegar or rubbing alcohol to sanitize.
Replacing a Bathroom Faucet?
Storing a Toilet Brush
Say Good-bye to Wet Bathroom Counters and Floors
Cleaning the Bathroom Without Toxic Chemicals
Clearing a Clogged Bathroom Sink
Storing a Plunger