For those whole formula feed, how do you make your bottles?
I am currently using Philips Avent bottles. Lately LO has been a little more gassy. I use bottled water and add the formula then shake the bottle. I'm starting to wonder if he's getting too many air bubbles in it from me shaking the bottle.
I was considering switching to Dr.Browns bottles, but wasn't sure if shaking to mix would render the same problem just with a different bottle, not to mention all the parts you have to clean with those bottles.
I have considered pre-mixing the formula in one of those formula mixer jugs and heating it, but I didn't really want him getting used to warmed bottles and then not take room temp bottles when we are out and about. I've tried cold formula from the fridge before and it made him have an upset stomach.
I have also considered the baby Brezza machine, but that just adds another thing to have to clean and only it only makes ounces in even sizes, 2,4,6,8, etc.
So for those who formula feed, what do you do?
ETA: after re-reading my post it sounds like I am super lazy, but I am not. I just want the most practical/effective option, without adding a bunch of unnecessary things, however I'm willing to do what I need to do for my little guy.