Tricky corners, sippy spouts, slim straws. Sippy cups are essential for teaching your toddler to drink like a big kid, but sometimes you can't get them as clean as you'd like. Munchkin's convenient brush set, Details, solves all of your cleaning issues. Equipped with four uniquely-sized brushes, it will clean and scrub every crevice no matter how tiny. The Munchkin Details Bottle and Cup Cleaning Brush Set with Key Ring includes a straw brush, spout brush, lid and threads brush and detail brush. An added bonus, there is a pick on the storage ring that makes it easy to remove sealing rings. No more residue or wondering how clean your cup really is.