Big is always not better.When we look at the things we use at home in our daily lives, the fast moving consumer goods (FMCG), it has changed in terms of size. The soaps, shampoo, toothpaste and many other things we use for laundry and home cleaning purposes, the package and the content/unit have become bigger.
By clever marketing techniques (offers, savings tags, 25% free etc), the consumers are encouraged to buy the bigger tubes or packs with the idea that they can save on expenses.
But if you really look, the pastes, creams, soaps etc, we waste more each time we use and the end result is that we are more likely to use more volume and the actual saving advantage would be lost. If you think about the dish/clothes washing soaps, the mouthwash bottles and the pastes it would be easy to understand.
I think it would better to have the smaller packs wherein the volume per use would be better and at least we wouldn't waste the product/item each time we use it.