I always start my babies on sippy cups at six months old. I found these Nuby sippy cups and was hoping that I had found a new model for my baby to try. He liked it immediately, but I get sick of cleaning it out. In. In order to wash it, you have to remove the entire soft-nippled section off the top to wash it, and then reattach it. The dishwasher doesn't really reach all of the nooks and crannies of the nipple, so I have to use a clean toothbrush to thoroughly clean it. Putting the top back on is also a pain. You have to tuck certain parts of the soft plastic in other parts and if you don't want the sippy cup spilling all over the place. It is easy to get it bent or pinched, in which case the liquid inside will spill all over your baby. The advantages this cup has is that it has a large capacity (10ounces), so I could even fill it with formula when I needed to, and it it is relatively inexpensive compared to other beginner sippy cups.