Posted this earlier in this thread. And the water is far cheaper than the beer bottle. Just stuff the end with some napkins. I do it every game and it works like mad. Though the fans seated near you, look at you like WTH, cause it is so loud.
I gave this a test run at home a while ago and it definitely is a lot louder with the napkin included lol...Once my whistle comes in the mail I’m ready to go!! ?