#DC002 - Group of 4 Early Milk Caps with Cow's Head Pictured and Pull Tab You get 4 for 60¢ (that's 15¢ each). This is a standard size (1 5/8" diameter) milk cap that pictures a cow head and has a pull tab. Perfect milk cap for most old milk bottles as it has no name and is the most common size and so can be used with bottles from almost any dairy. Circa 1930s. $0.60