Yosef Karo, Translation:Shulchan Aruch — Even ha-Ezer 1
“ Paragraph 9- If one tells a woman, “marry me with this cup,” and the cup was full of water, she would be married with the cup and what is inside because they combine to be a perutah-worth. If it was full of wine she would be married with the cup but not with what is inside. If it was full of oil, she would be married with what is inside and not with the cup. Thus, if the oil was not worth a perutah, the marriage would be uncertain, and if the oil was worth a perutah, the marriage would be certain. ”
