Have been looking into these myself. There’s a good variety to choose from just depends on how much you want to spend. Most of the cheap er units aren’t going to cool well enough in the summer to keep milk or fish etc for very long.
Here  is a good review article
	
	
		
			
				
			
			
				
				An electric cooler keeps your food and drinks perfectly chilled on the go—no ice, no mess—whether you're camping, road-tripping, or tailgating, so you...
				
					
						
							 
						
					
					www.outdoorgearlab.com
				
 
			 
		 
	 
One to consider as wel not listed, they have different sizes
	
	
		
			
				
			
			
				
				VEVOR 12 Volt Refrigerator: 47.5Qt storage, fast cooling from -4℉ to 68℉, app control, LED light, battery protection, perfect for travel, camping, and home use.
				
					
						
							 
						
					
					m.vevor.ca
				
 
			 
		 
	 
If they list a wattage you can divide that by 12v to get the amperage draw.