Kipper snacks are actually herring fish which are canned in a specialized way. (There is no such species as a kipper fish!) Chicken of the Sea® herring are wild-caught in the ice-cold waters off Canada. Frigidly cold waters yield firmer fish that are better-tasting and richer in healthy omega-3 fish oils.
What do Queenie's herring snacks represent?
Fancy Snacks
The three girls come into the A&P to buy herring snacks. Sammy draws conclusions about their lifestyle based on this purchase. The snacks symbolize the girls' upper-crust homelife, which is borne out by the way Queenie sounds when she speaks to Lengel: "'We are decent' ...
Are herring snacks fancy?
The herring snacks are a fancy, expensive item. He contrasts that with his own family, where fancy means beer glasses.