Worth is a synonym of Merit. 
Dish can be used for Air. you are likely to find Air in/at/on Supermarket. you are likely to find Cart in/at/on Supermarket. Cart is related to Milk. 
Worth <--Synonym--> Merit 
Dish --UsedFor--> Air --AtLocation--> Supermarket <--AtLocation-- Cart <--RelatedTo--> Milk 