Nipple Confusion... Is this real?

Lynzee • Mommy to Ammarie, born on March 3,2016!
My husband and I were out shopping and ended up looking at baby items. He found some ninja turtle bottles (insert eye roll here), and got them. I was looking at other brands, Such as Avent. But I've heard of nipple confusion. I intend on breast feeding, so that would be a big deal to me, but I've heard women say that it's not real. 
Is it? 
Based on that question, what bottles are best for a breastfeeding mom and baby?