Oral-B Toothbrush and Cup Holder

Our Oral-B electric toothbrush holder has space for 4 tips. My youngest son recently was given the go ahead/recommendation to use the electric toothbrush bringing our family count to 5. We had been keeping his toothbrush in a cup on the counter, but that kept getting knocked over.

Each kid also uses a small 2oz cup for rinsing their mouth, taking drinks of water, etc. They are horrible at labeling them so we end up with 7+ cups around the bathroom sink. Now each kid has their own toothbru