When it comes to pricing for products such as cup of fresh juice and smoothies, there are no hard and fast rules about it, the prices depend on the size and packaging. (profitableventure.com)
There is no strict rule about they work, behave or attitude that's will be constant anyway. (onlykidszone.com)
However, as explained above there really is no hard and fast rule about it. (easybabylife.com)