These straw cleaners are a must if you already have bamboo straws and you want to keep them optimally germ-free. They come in 2 different models and composition. The one you are visualizing is the most resistant model and is made from coconut fiber and steel.
If you prefer a 100% organic composition you can find brushes made of gai fiber and bamboo here⇒
100%natural 100%recycled 100%thorough cleaning