Tumbler / Bottle

Usually, shampoo bottle is easy to be knocked over, especially in the wet bathroom, or cannot open eyes when bathing.With the reduction of the shampoo ,bottle is more likely to be knocked over.

This bottle has a spherical bottom and some weights at the bottom .Its’ center of gravity is lower , and this advantage is more obvious when the liquid reduced.So, you do not have to worry about that situation( knock over a bunch of bottles). They will firmly stand there,like a tumbler.