Objective: How can you limit soap usage?

Which of the following solutions is more sound in terms of naive physics reasoning?

Choices: 1. To limit the quantity of soap used, place several rubber bands below the top of the pump on soap dispenser, this will reduce the amount in each pump. 2. To limit the quantity of soap used, place several rubber bands below the top of the bottle around the middle of the soap dispenser, this will reduce the amount in each pump.
1.