"Perfect for cleaning reusable bottles"
I had been looking for ages for a suitable brush to clean a specific, Danish made glass bottle that I have and this fits perfectly, it fits in the 1½" diameter neck easily. The main brush has a long enough handle to comfortably reach the base of the bottle and clean it easily. The small ring brush is great for cleaning the lid. I have yet to use the straw brush. I highly recommend this if use refillable water or sports bottles. It is much better than the toothbrush I was using previously.