Straw Cleaner Brush Extend 12 inch Extra Wide 12mm diam Pipe Cleaners Extra New
Simply insert it into the pipe, rotate it, remove and wash it. And it can reuse, it will be better to use with a little dish soap and warm water. If you do not use it, Pls Keep it in dry place. You can also simply put it in the top rack of the dishwasher and hang to dry.