Best bottles for breastfed babies?

Sasha
I went to do my registry today and was insanely overwhelmed by the bottle choices. I plan on Breastfeesing the majority of the time but I understand that times will arise when bottles are necessary. 
What bottles are the best? Plastic or glass? Nipple types? How many should I get? Should I get a few different varieties? 
Thanks in advance mamas 😘