This is just a thought, but maybe it would work well. You can buy a Decorator Bottle Set from Pampered Chef, and then the bottles would be refillable. They are also dishwasher safe, and a bonus would be that your kids could have their toothpaste come out in different designs; maybe that would encourage those who dislike toothbrushing time
You can buy a set of 3 for 10.50, plus it comes with 3 tips and a cleaning brush. (product #1585 if you go to the website) Just an idea...and I know there are some ladies on here that sell PC.