In a bowl, combine the coconut milk, seeds, shredded coconut, maple syrup and vanilla extract. Whisk until well combined.
Let the mixture sit for about 30 minutes at room temperature.
Mix once more, cover and refrigerate for at least 3 hours (for best results, refrigerate overnight).
Layer some of the chia mixture into the bottom of each jar or bowl. Top with some diced fresh mango, alternate layers of chia mixture and freshly diced/pureed mango until glasses are filled to the top, ending with fresh mango.
Top with some toasted almond flakes and serve immediately or keep in the fridge until ready to serve.