Mashed potatoes in a bag?

So as we are packing to move, more on that later, everything to mash the potatoes are packed up. So i thought well maybe i can make them in a bag. So i made sure my potatoes were really cooked and soft. I poured the water out n then put the potatoes in a larger ziplock bag. I melted butter n added that. I closed the bag and with a towel over the bag began to mash. After a few mins i added some milk and continue to mash. They came out really good. I think i may do this more often!