Hi All,
I don't think I've formally intro'd, but my LO was born at 32 w 4d in July. Spent 28 days in the hospital (only 3 days total in the NICU), and we've, thankfully, had a pretty uncomplicated course. I lurk here sometimes, but almost feel "guilty" that my baby was so healthy and our hospital stay was so easy. It's like I feel like a farce of a preemie mom, so I don't contribute much...
Anyway, my question regards finding a new nipple for bottle feeds. She's been eating from a bottle since day 1, and we've always used the Enfamil standard flow (blue collar) disposable nipples. They were provided in the hospital, and since coming home in August we haven't been able to find any she likes, or will eat a full bottle from. We currently buy the single-use nipples from Amazon, and they cannot be sterilized in my steam sterilizer (they obliterate).
We're starting daycare in January, and I've been trying to find a nipple that I can send with bottles that has a cap - and that doesn't come individually wrapped and has to be thrown out after each use

Now, since she became so accustomed to the standard flow nipples, breast feeding has always been more of a snacking/comforting thing, rather than a full meal thing. It's too slow for her and she has limited patience for it, so she prefers bottles of pumped milk. That being said, we've tried slow flow and medium flow Medela nipples, and Life Factory nipples. No dice. The slow flow Medela is too slow, and the medium flow appears too fast, and she keeps tongue thrusting both out. I don't know if she prefers the "texture" or resistance of the rubber nipple better than the silicone, or if it's a flow thing, but what's between slow and medium flow
Any suggestions? Has anyone found a nipple LO successfully transitioned to after using the Enfamil single-use nipples? I just feel lost and like I need a sense of direction before I buy 10 different types of nipples and they all fail because I'm not considering something. TIA!
ETA: wording
Re: Transitioning nipples: UPDATE in comments