The bottle for the Chameleon Concealer is a new type of airless vacuum pump. There is no tube inside. The vacuum pump pulls the product up from the bottom via an airless vacuum system. So you will not find any thin little tube like a straw inside the bottle. It is empty and meant to be empty.
This is used so that as little contamination from outside bacteria enters the tube as possible. On a new tube it takes several pumps to begin with to get the product to the dispenser head. Once its there it pumps out on the first pump each time.
It is designed only to pump out small amounts each time for controlled use so that product is no wasted.
If you are having trouble pumping then the lid may need to be screwed on tight and correctly. If it is loose or not screwed on properly a little bit of air can be pulled into the tube which stops the vacuum pump working.