because I didn't know any of this:
Only use traditional sippy cups for a quick transition to cups (~a month), then switch to straw cups. Teach your kid to drink from a real cup between 12-15 months, then just use sippy cups for when you're out. Ditch the sippy between 2-3 years old.
I'm glad I didn't go buy 6 Nuk Learners at $8 a piece.G knows how to drink out a real cup and would prefer it that way, so maybe we can skip a few steps?