Combine all ingredients in a large storage container that has a lid. Make sure all the chia seeds are mixed in, and mash the berries lightly, especially if using frozen raspberries.
Place the lid on the container and refrigerate overnight or for at least 8 hours.
Serve with extra raspberries, and a drizzle of honey, if desired.
Notes
You can substitute any kind of milk for the coconut milk.
The lemon zest and lemon juice is equal to 1 medium lemon.