Food storage and packaging
Foods should be stored in either strong plastic or cloth bags, or in aluminium or plastic containers. The main considerations are sealability, weight and compactness. You may be able to recycle some packaging, but you may be able to buy a more durable product which may be worth the money in the long term. Specific use bottles have advantages in being durable and leakproof, and they have special internal coatings.
Compactness is a consideration. This is particularly relevant when empty. For example, carry muesli in plastic bags because the package gets smaller after each breakfast. Pre-mixed foods can be placed in marked bags or containers. Some people prefer to have each complete meal packed separately, while others sort all their meal types, say breakfasts or snacks, into bags according to the meal.