Paper bags can be used for temporary pantry storage of dry goods like potatoes, onions, or bread, but they are not ideal for long-term storage due to their lack of airtightness and susceptibility to pests.
Paper bags offer a breathable storage option, which can be beneficial for certain items. For example, potatoes and onions benefit from air circulation to prevent moisture buildup and premature spoilage. Bread can also be stored in a paper bag for a day or two to maintain a slightly crisp crust. However, paper bags are porous and do not provide a barrier against humidity, pests (like pantry moths or rodents), or odors. This means that food stored in paper bags is more likely to dry out, become stale, or attract unwanted visitors. For long-term storage, airtight containers made of glass, plastic, or metal are much better choices. These containers protect food from moisture, pests, and light, extending its shelf life and preserving its quality. Consider transferring items from paper bags to more suitable containers as soon as possible for optimal preservation.
Never store strongly scented items like onions or garlic in the same paper bag as other foods, as the odors can easily transfer and affect the taste of the other items.