How long do baby bottles stay sterile?
Keep them covered in airtight container. But even that probably wouldn’t keep them sterile in 8 weeks! Why not just put them somewhere safe for now. Then wash+sterilise and put in airtight container about 4-6 weeks from now. Besides, once your baby’s born, you’ll need to wash and sterilise after every use anyway. So there really is no big advantage in sterilising now.