My IGO-L can hold 15 drops with my cotton wick setup. I do not drip and drive. I drip only while stopped in a parking lot. I always take along a tanked device even for around town trips. It's just not worth it to be distracted while moving. I usually don't even answer my cellphone while driving.
	
		
			
		
		
	
			
			 
				
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		