Stand up bags are available in different sizes and form factors. Some pouches are small enough to contain just one ounce of butter or lentils. Large pouches can pack several pounds of grains or flour.
Manufacturers can concentrate on their product without having to worry about finding suitable soap or nut packaging. This not only improves the quality of their products but also earns them more profits. When they launch their products in packages of different sizes, they manage to sell more units and make more money. On the other hand, inflexible packaging solutions like glass jars and tin cans do not give manufacturers this freedom.
Consumers also benefit from this situation. When products are available in packets of different quantities, they have more choice - they can choose a packet of the right size. So, for example, if they need only a spoonful of coffee, they don't have to buy a pound. This helps them save money. When they buy larger packets just because the small coffee bags are not available, they have to pay more. They also have to find an appropriate storage option for the excess amount.