It is important to note that not all dry food items can be stored in the same way. For example, milk powder and protein powder are fine, dry items that must be stored in containers that are highly airtight to avoid moisture absorption and caking. Containers are also important for dry, granular food like rice and oatmeal, but they must be easy to pour and clean, and small food particles must not get trapped in the container. For dry food that is highly aromatic, such as spiced cereals and flavored cereals, the plastic food container must not absorb odours. This is important to ensure that the storage spices do not change the food’s original taste.
Safety is the main concern when it comes to using plastic containers to store dry food. We typically see PET and HDPE food grade plastic containers. PET is a light and see through plastic container which allows the user to see how much dry food is left. However, it is best to avoid PET containers when dry food is to be stored for long periods, especially in high temperatures. HDPE is much better for long term storage of dry food such as whole grains as it is impact resistant and has better chemical stability. Always check for food contact safety certification on a plastic can. Without it, harmful substances can be transferred to the dry food and make it unsafe for eating.
Ensuring the shelf life of dry food is as long as possible requires preventing the intrusion of air, moisture, and pests. When testing the airtightness of a plastic can, inspect the lid construction. An effective lid will typically feature a silicone or rubber gasket that closes into a secure seal. In addition to facilitating open-and-close operations, certain plastic cans utilize a twist-lock design which is more effective for sealing. Testing the can for airtightness is recommended and can be done by performing a simple inversion of the can after sealing the lid to see if any air escapes, demonstrating effective sealing performance.
In daily life, how convenient a plastic can design is depends on the practicality of the design. The capacity first should match the amount of dry food stored. A can is too large and repeated opening and closing will lead to air exposure for the remaining food. A can is too small and the user will find constant refilling to be a nuisance. It also matters how the can is shaped. Cylindrical plastic cans make it easy to stack and save storage space in a cabinet or pantry, while square or rectangular cans fit better into corner areas. Usability can also be improved by small features like a wide mouth or built-in spoon holder. Being able to easily reach food or clean the can, wide mouths make it easier to take food out, and a spoon holder keeps the serving spoon clean and helps prevent it from being lost.
Regarding cost and ecological sustainability, strength and reusability matter. Quality plastic containers should withstand falls and scratches, so they should not crack or deform from normal use. Plastic containers should also withstand repeated cleanings, as dry food residues may stay inside after use. Ensuring easy cleaning also means preventing cross-contamination when different types of dry food are stored later. Finally, the use of these plastic containers should remove single-use packaging, which many consumers consider eco-friendly and simplistic for prolonged use.
EN
