Use mixer to combine cream cheese and marshmallow whip together in medium size mixing bowl until smooth.
Place in pastry bag (Ziploc baggies work too! just cut a tiny little corner off at the bottom either side works) place in fridge until strawberries are prepped.
Use small knife, such as paring knife, to cut the top of the strawberry off in a fashion that creates a small bowl inside the strawberry. hollowing the strawberry allows you to put the filling inside it.
To have self standing strawberries cut off a small piece of the bottom and it will sit upright.
Use "pastry bag" to fill strawberries. If you don't plan to serve them immediately place in fridge.