first years breast flow bottles

okay so my son barely ever takes a bottle but the one bottle that my son did take was the first years breast flow bottle...well about a month or so ago my cat decided it would be a wonderful idea to chew up the nipple to the bottle along with a part on my breast pump....

I was wondering seens how I should probably at least get one nipple for that just incase i have to leave my son with someone should i get stage one (slow) or stage two (medium). He is almost nine months old and i plan on breastfeeding until he self weens.

Or should I just not get a nipple at all...He did take the playtex drop ins a couple of times.
Idk what to do lol. maybe I will just order one nipple for just in case