I buy this brush because I be a big fan of the Dr. Brown bottle . I think this brush clean the bottle very effectively until it start to show wear and tear after a few month . in all honesty , this brush last for about 8 month for I , but we do not use it daily to clean bottle , as most of the time we run the bottle through the dishwasher . the sponge start to break down , which be not a big deal as sponge do not last too long , but the wire stem be pretty flimsy out of the box and just break today .