changing bottles at 6 months?

from early on we've used Dr. Browns bottles.

we also had the regular standard Gerber bottles.

You could tell when we used the Dr. browns bc they do work for gas.

not the most fun to wash but they helped his little NB belly.

he's 6 months now and we've tried some Evenflo standard bottles and some other standard bottles. we still use Dr. brown nipples tho bc its all he'll take.

has anyone else changed bottles as baby gets older?

since their bellies are maturing and stuff and gas isn't really an issue as much.

which bottles are you using now? have you switched? will you switch?