In a bowl, combine cold water and sweetened condensed milk until smooth. Add instant pudding mix and stir to combine. Refrigerate for 30 minutes
About 10 minutes before you pull the pudding out of the fridge, whisk 1 pint of heavy whipping cream into soft peaks. A mixer is ideal for this, but a whisk is fine.
Carefully fold the cream into the pudding mixture.
Slice 4 bananas in 1/2 inch coins and set aside.
In a 9×13 pan, add 1/2 of the box of Vanilla Wafers to bottom of dish.
Pour Half of pudding mixture over cookies. Layer with half the bananas
Add other half wafers and layer with cream and bananas. Put in refrigerator for 1 hour, or until ready to serve.