Brainfluence

Sales-killing choices are those that appear very similar and offer the consumer no shortcuts in making a decision.

From a practical standpoint, this means that if you have a solid product at the top of your line, you can actually increase its sales by adding an even higher-priced product above it in the lineup.

counterintuitive as it seems, the presence of some small cans would likely boost sales of the larger promotional cans, perhaps even taking market share away from competing products that came in the larger size to begin with.