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Urine and milk create a chemical reaction. When mixed they tend to foam over as the milk neutralizes the urine. Drinking acidic drinks such as Mountain Dew before the experiment will increase the amount of foam. A couple of dashes of salt will act as an accelerant. Keep in mind, this does foam a good deal. Use small amounts in your container, or you will have an undesirable mess to clean.

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11y ago

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