OXO’s Transitions Open Cup Trainer features a clear, removable training disk so little ones can see liquid while they drink to learn how far to tip the cup. If they over-tip the Cup; the disk lets a little liquid flow through, teaching them how to orient cups and be careful while drinking. A little mess for a lot of learning. The disk controls the flow to minimize messes, and has three training settings and 360 Degree drinking for easy transition from sippy to open cup. The OXO Tot Transitions Series features interchangeable cups and lids for easy transitions from infant to toddler to big kid.