Soak your almonds overnight. Put 1/2 cup of almonds in a glass jar, cover them with water, and let them soak while you sleep.
In the morning, drain and rinse them.
After rinsing, place them in your blender with 2.5 cups of filtered water. Blend on high speed for about 5 mins.
Use a milk bag (linked above) to strain the almonds. Lightly squeeze the bag until all the liquid is out and all you have left in the bag is the almond pulp. Don’t discard the pulp!
Transfer the milk to a glass jar with a tight fitting lid and store in your fridge for up to 4 days.