quip Toothbrush / $45

quip's journey began at a neighborhood dentist in New York, and a suggestion to use "the cheapest electric brush available" to fight the common, and damaging, habit of brushing too hard.

I for one have never used such a brush, it's soft, affordable and every three months a new tube of paste, AAA battery and a travel tube come via post. All that for $45 compared to Sonicare charging $200+ and doing more damage than good.