I am not exactly sure what you are asking, but let me start by answering exactly what you asked.

To measure the nectar, use a teaspoon. To measure the water, use a liquid measuring cup that is marked in ounces. If such a measuring cup isn't available, 3 ounces is also 3/8 cup, or just a little less than a half cup.

If this is not what you are really asking, please ask again with  more specifics and I will do my best to assist you.

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