If you buy 2 cycle oil in bulk, you can use the small pre-measured containers over and over.  When you open one, mark the full line with a magic marker then refill.  The small containers are convenient for a quick mix.  If you are running 25 to one, for an older saw, use the Stihl pre-measured container for 2 gallons of gas in one gallon of gas.
	
		
			
		
		
	
				
			 
 
		 
 
		