After finding one of our children has ADHD we don't want to take any chances by encouraging any other problems to arise. Thus, we are taking every precaution possible to keep our kids safe from things that we can prevent. The BPA-Free plastics was a big thing because had we known about it sooner we could've prevented our children from being exposed to it. I don't want to further expose them to this harmful chemical so when I saw this Diego cup with BPA-Free on the label I was more than willing to dish out five bucks for my sons safety. This model cup has a soft straw that can be covered with the built in cover. It also is top rack dishwasher safe. It's easy enough to take apart & set up again. There is also an area on the outside to write your child's name with a permanent marker. It keeps his drinks chilled thus, great for his milks & juices. Just be sure to wash it as soon as your childs done drinking to prevent clean up from being any harder.