Howdy fellow Michigander!I live in Michigan and we are in the middle of a heat wave. I freeze a gallon of water overnight. Leave it sealed and put it in with my 3 gallon water in the morning. I love it.
My waterers are smaller, so I freeze water in small 12 oz plastic bottles and put those in their water to keep it cool. Its been working well I'll be glad when the high heat weather is past!