Locking out oxygen is one of the primary functions of food and beverage packaging, but ongoing research suggests oxygen levels for shelf-stable foods are so high, the likelihood of delivering a quality product is remote, regardless of the package used.
For the casual baker, premeasured packets of brown sugar proved to be a convenience they were willing to pay a premium for over the holiday baking season.
If the kids turn up their noses at Flintstone vitamins, maybe a packet of Italian herbs laced with B12 and niacin for their pizza is the way to ensure balanced nutrition.