These Old Milwaukee Beer Cans are Can Safes That Work to keep your valuables secure. Since most burglars spend less than six minutes inside a victim's home, they only have time to check the most obvious places for valuables. These are can safes that work by allowing you to hide valuables inside common an everyday Old Milwaukee beer can -- one of the last places a thief would think to look. According to the Chicago Police these cans safes that work are better than a locked safe and a thousand times cheaper.