In a large, sealable container (such as a Tupperware container or Mason jar), mix together chocolate milk, oats, chia seeds, salt and pumpkin seeds (if using).
Cover and refrigerate for at least 8 hours and up to 4 days.
Taste oats and stir in maple syrup, if desired.
Portion into 2 bowls and serve (or eat straight out of the container).
Top with chocolate chips, if desired.
Pair with a glass of milk - chocolate or classic - and enjoy!