Want to keep ice in your drink all day? Here is a trick. Put ice in a clean insulated cup and whip it into the freezer the night before. Here at DUN we try to kick plastic, so I skip individual water bottles. Instead I freeze a little water at the bottom of one gallon water jugs. Fill with cold water the morning of and pop the frozen cups into the cooler.
When ready to drink, just open the lid and pour ice cold water over the ice. Keeps your drinks super cold all day. You can also freeze a koozie and that will help keep your cans super cold as well. No excuse to drink warm beer again! Have a cold one for me and enjoy the last days of summer.