Lixit Bottle and Tube Cleaning Brush is a high quality, multipurpose brush to help you keep your bottles clean and algae free. This highly practical and economical product features 2 brushes in one. The smaller brush at the handle works great for cleaning caps and tubes, while the long brush can be used for cleaning everything from critter tubes to modular cages. Its extra long, 16 in. brush also allows the user to easily reach the bottle's deepest end for a thorough clean up. It also features a handy loop for hanging so you will always know where to find it.