This is for when you'd like seperate breastmilks for seperate stones or pieces. If you'd like two different milks from different babies mixed together, there is no extra charge. Breast milk must be properly preserved before incorporating it into any keepsake item. Failure to do so may lead to your keepsake piece developing mold and discoloration, turning brown or even black within a short timeframe. In my experience, using a high-quality preserving powder is the most effective way to ensure long-lasting preservation of your breastmilk. When using a breastmilk preserving powder, I combine your breastmilk with a specialized powder and gradually heat it until it forms a thick paste. Subsequently, I transfer this paste onto a parchment paper and allow it to thoroughly dry, a process that typically takes anywhere from 24 to 48 hours. Once completely dry, I crush it into a fine powder, creating your own preserved breastmilk powder. This powdered form can be seamlessly integrated into your uv resin to craft a cherished keepsake.