Using a pneumatic conveying system

Warehouses are large spaces devoted to the storage of goods and items. Some of these can be high value, such as bottles of alcohol and cigarettes, or staples like foodstuffs for supermarkets. Many of these items naturally come in bulky packages or are on pallets. They are easy to move around the warehouse as you can simply use pallet trucks or just manual labour to shift them to where they are supposed to be. However, what if you have small loose items? For example, Grains or liquids. How do you transport gases and small hard times like medical pills?