When it comes to babies weaning, the only thing you can truly expect is that you won’t know what to expect. A great piece of advice is to go slow and follow their lead. Some babies can jump straight into an open cup, and that’s amazing, maybe even preferable. But, for many, dealing with the constant spills is too much. Other times, babies have difficulty adjusting or having the motor skills to go straight to an open cup. Transitioning from breastfeeding to a sippy cup can be a long process, especially finding one that works well. The trial-and-error process can become frustrating and expensive, so have a game plan and research before buying cups.  A good rule of thumb is if they can sit up in a highchair, they’re probably ready to try a sippy cup. Of course, there may be babies where this rule may not apply, but as the parent,…