Using this 16 oz liquid pump dispenser is super easy. First, twist the top open to fill it with your desired liquid, like acetone for nail services or makeup remover. Then, twist the top back to lock it in place. When you need to use the liquid, just flip the cap and press the pump. As for maintenance, it's a good idea to clean the dispenser regularly. You can empty it and rinse it with warm water every few weeks. Be careful when handling liquids like acetone and alcohol, as they can be flammable and irritating. Always keep the dispenser in a cool, dry place, away from direct sunlight and heat sources. Also, remember that the cap color you receive might vary based on what's available.