Every household keeps a collection of soap, shampoo and other cleansers. We usually do not change our brands frequently and the containers contents does not perish.
It therefore makes a lot of sense to buy cleansers in large containers, so that you do not have to purchase them frequently.
On the other hand I recommend small dispensers. A friend working at Procter and Gamble once told me that they like selling big dispensers, because it unconsciously gives consumers a feeling of abundance which results in higher usage. A smaller dispenser has a notion of scarceness so you that you just use what you need. You have to refill the container more often but it saves you real money.
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