Exclusive breastfeeding to mix feeding

Hello mommies. Any suggestions or tips on how to mix feed po from ebf? like ano gamitin na bottle tapos formula milk na ginamit niyo kay Baby. and how you store your extra breastmilk (for long term)? Thank you mommies. #firstbaby #firstmom #FTM #pleasehelp #firsttimemom #advicepls