It's easy to make nut milk at home. With a blender, a fine sieve, nuts, and water, you can whip up an entire quart in four simple steps.
Place nuts (almonds are shown, but you can also use cashews, pistachios, or hazelnuts) with an equal amount of boiling water in a blender. Let stand 30 minutes.
Add 3 cups room-temperature or cold water; blend until frothy.
Strain mixture through a fine sieve lined with cheesecloth into a bowl, pressing down on solids with a flexible spatula; discard solids.
Chill (up to 5 days) and shake before serving. Try nut milk in smoothies, over cereal, in coffee, or just by itself.