How to build a 24 hour refrigerator in under $2

styrofoam icebox from dollar store for $1.25

aluminium foil cut out

line the inside of icebox, including cover with aluminum foil, takes 3, 10 inch sheets, a pack of 30 sheets costs $1.25

Put two small plastic containers of ice in it, to prevent wet mess.

In 12 hours, the ice barely melted and unternal temp was 41F, the avg refrigerator temp is 39-40F.

At this state of melt, the cooler will be effective over 24 hours to keep meats and food from spoiling during power outages, camping or road trips. Room temp was 54, summer outside temps are higher but it should last for over 12 hours+ easily.

For more effectiveness, cover outside with aluminium foil to reflect away outside heat.