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			I use the CMG whistles myself. 
 
I get about 40-50 games out of one before the cushion wears out to the point of annoyance...  
 
$7.00 / 50 games = $0.14 per game.  Hardly worth worrying about from a cost standpoint.  Just order/buy 3-4 of them next time you buy something else, and you'll be set for awhile.
		 
		
		
		
		
		
		
		
		
	
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