Debating getting these for the babe. We're about to have #3 and have 2 toddlers would be nice not to have to wash bottles every day on top of running around chasing toddlers and tending to a nb. But my question is for anyone who has used these are these nipples single use? The bottles are about $1 each and nipples over a $1 each seems expensive if they aren't able to be used a few times. What's your experience?

I don't want to get the ready mix and then pour in the bottle, mixing the bottle isn't hard it's the making sure they're washed and sanitized when babe is having a melt down!