In a large mixing bowl, whisk together the almond milk, chia seeds, honey, and vanilla extract until fully combined. Make sure the chia seeds are evenly dispersed.
Let the mixture rest for 5 minutes, then whisk again to break up any clumps and ensure a smooth texture as it thickens.
Divide the chia mixture evenly among four small jars or containers. Spoon the mixed berries on top of each portion.
Cover the jars and refrigerate for at least 2 hours, or overnight for a thicker consistency. Stir before serving, if needed, and enjoy chilled.