A ToothBrush is a ToothBrush is a ToothBrush as long as it cleans. Zig-Zag, Pointed, Blunt, Thin, Rough, Soft. Do we really want all of this. The primary function of a brush is to clean. And it is not what brush you use but how you brush. What did our elders use when there was no Zig-Zag. Did all of them have dental problems. No. Is it that all those who use Zig Zag have no dental problems. Definitely no (no research proves this but it is common sense). It thus does not mean that if you change the shape of the brush you are removing the risks of dental problems. Its what you eat, how you brush, how often you brush, etc. The manufacturer will try new means and ways of getting customers to buy the product, but we have to act wise and think twice. The same applies to other products and product categories. Whitening granuales means nothing to me. I want results. If the product does not deliver then it is plain out of my shopping list. Then no matter what product additions or promotions the carry out, I will not buy it.