Bottles and breastfeeding!

Lynzee • Mommy to Ammarie, born on March 3,2016!
I just had a quick question. I plan to breastfeed, however, since I do need to go back to work, I also need to pump and use bottles while I'm away. 
I've been looking at Avent natural bottles and nipples. 
I'd just like to see if any of you moms have used these while simultaneously breastfeeding and using bottles? 
Opinions and reviews!