Review on Hiware Drinking Straw Cleaner Brush Kit: 9-Piece Extra Long Pipe Cleaners - Perfect for Tumbler, Sippy Cup, Bottle, and Tube Cleaning by Daniel Bates

That's great. High quality bristles and wire handles. They were very good at removing smoothie residue from my Starbucks reusable straws. The smallest mop fits perfectly in diameter, but it turns out that the largest mop fits perfectly too. In terms of length, I've found that the largest scrubber is the only one that fully pushes through my 10.5-inch straws, but it doesn't matter that shorter scrubbers can't. The smaller ones actually have slightly stiffer bristles, so the smallest ones can come in handy even if I end up using the largest one.