Add the rolled oats and chia seeds to a 16-mason jar container. Of course, you can use any container with a lid (I recommend glass), but mason jars are my favorite.
Stir in the milk and raspberries to the oat mixture. You want to make sure the oats are submerged in the milk completely. If you need to add a little more liquid, then do so.
Place the lid on and stick the overnight oats in the refrigerator for 5 hours or overnight.
The next morning give the oatmeal a couple of stirs and add the maple syrup.
After you stir in the maple syrup, add a couple of splashes of milk to the oats if they seem thick. Do this until you get the consistency you want.
Pour into a bowl or eat straight from the jar.
Sprinkle with sliced almonds and extra raspberries.