Turn tap water into a fountain for rinsing after brushing
Check out this cool product called Rinser Brush that turn your toothbrush into fountain:
No disposable cups to buy or throw away. No glass to wash or take up counter space. No changing hands to cup water. And, no head in the sink sipping. Just aim the fountain where you want the water to be.
Product is at Pre-order stage, order now here andsave money (22$ instead of 35$).