Aiyoh, I totally get the worry lah! Honestly my group of mum friends, we've done all three, some started with glass and realized it's not practical, a few switched to plastic bila baby dah older and less likely to drop, and one of us tried the hybrid bottles tapi honestly she said payah nak cuci the inner parts properly. If you're really concerned about microplastics, maybe go with good quality BPA-free plastic bottles for now (they're tested safer) and switch to glass when your baby is older and more stable, that's what most of us ended up doing, and it's less stressful than constantly worrying about breakage or unclean hybrid bottles! Honestly the hybrid idea sounds good in theory tapi in practice, kesian the mama more headache kot.