WWYD: Bottles

I'm freaking out a little about returning to work because BF'ing is going so well with DD. With DS by the time i returned to work I EP'ed and supplemented so it wasn't so complicated.

DD nurses great and doesn't love bottles. She will drink from one with some effort but doesn't latch well and doesn't take much. We have Medela bottles and nipples left from DS. I ordered the new Lansinoh bottle from Amazon last week to try out as well. I have left her with my SIL and our regular DCP a few times now for just a few hours each time. They both said she will drink from the Medela but latches better on the Lansinoh. I really don't want her to start to prefer bottles and have a problem with nursing. This happened to some extent with DS although there were probably other factors as well. It is a huge regret of mine that he stopped nursing and I never corrected it. I was so overwhelmed with his reflux, my c/s recovery, and going back to a stressful job at 8 weeks that I just switched to pumping when he went on a nursing strike.

Would you buy more Lansinoh bottles and just use those? Keep using Medela since she will probably get used to them and we have all we need already? I don't want to spend a lot of money if I'm just being paranoid but I have no problem buying them if it's the best thing to do for nursing.