Do you know the purpose of that piece of paper underneath every pau? The use of a small square of parchment paper under each pau is to prevent the pau from sticking and leaving behind food residue on the steamer.
Do you know the difference between "Best before", "Use by" and "Sell by" dates? Shelf life is the duration or time limit that a commodity is usable, fit for consumption and saleable. Use By" date is the standard term used for highly perishable products to tell you the time limit that is safe for you to consume. Take note. "Best Before" is a quality indicator which tells you how long the food will be at its best quality. "Sell By" tell retailers when to take the product off the shelves.