Reagan's key lime pie

1 big tube cool whip
1 14oz can sweetened condensed milk
1/2 C key lime juice
2 graham cracker pie crusts

Mix 1/2 tub cool whip, sweetened condensed milk and key lime juice together and pour into pie crust. Whip other 1/2 of cool whip and place on top if desired.

Refrigerate to set and keep cold.