Review on AICAR Drinking Straw Cleaner Brush by Vickie Kraus

I have to confess that I bought these tiny brushes to clean the sink, not the leakproof mug. I was having trouble keeping the sink drain clean in my bathroom. I tried different things including brushes but they were all too big and clinging to the lip. These little brushes are "perfect". I just spray on the drain cleaner and I can scrub the sides with the longest brush and all the dirt goes right off and the brush doesn't catch on my lip. I even have 8 brushes left for another project.