Firstly the packaging is poor and I faced a lot of confusion upon opening. It spread all over the inside of the package. And "after" unpacking and washing it couldn't be held. I keep it in a ziplock bag. What a mess! I bought two. Same problem with the second. Tube packaging is neither the newest development nor rocket science. Get a Star Brite tip. But all this would be forgiven if everything worked well. It is not. The zippers and buttons don't slip "easily". At best a "mediocre" means. I am looking for another product.