We bring frozen bottles of water and line the fridge with them. If we have something that we want to be sure stays cold enough in the fridge, we will put freezer bags of ice cubes in the fridge. I always bring an assortment zip lock bags in my suitcase for all sorts of things, hand wipes, phone on water rides or rain, wet bathing suits. I haven't noticed laundry bags for dirty clothes, last couple of stays at Disney, so a bag for that too. I'm not sure of the temperature of those mini-fridges? We always drive and bring a cooler.