3 in 1 Bottle Gap Cleaner Brush Multifunctional Cup Cleaning Brushes Water Bottl
3 In 1 Bottle Gap Cleaner Brush Multifunctional Cup Cleaning Brushes Water Bottles Clean Tool Mini Silicone U-shaped Brush. It can rotate 360 degrees in one direction (only counterclockwise), and has three different functional brush heads: a U-shaped silicone cupping brush, a multi-strand slit brush, and a bristle angle brush.