American Express currently have an offer for $25 off $50 for getquip.com. There are some toothbrushes you can get for $25 each, so 2x will bring you to $50 then get $25 back from Amex. Note you must add the Amex offer first.
I saw the adult electric toothbrush with plastic handle, as well as the kids electric toothbrush with rubber handle are $25 each. Comes with sls-free toothpaste too. You can also get creative and get other things there instead of toothbrush, as long as your total is $50 or over the Amex offer will apply.
Obviously ymmv if you have this Amex offer or not.