Since there are no stabilizers or emulsifiers in this homemade version of milk, it will only last for a week. You might see separation happening in the milk while it’s in the fridge, but all you have to do is shake it to combine before serving. Luckily it only takes a couple of minutes to make, so there’s no need to make more than a week’s worth at once. Be sure to use an airtight container for storage to maximize freshness. I like to use a mason jar.