Some of my products use an airless pump technology. Airless pump dispensers utilize a vacuum system to dispense and keep the product within the container fresh. Airless packaging helps to keep air and contaminates out of the product, which enhances the formula's stability and effectiveness. When using your product for the first time, you may need to "prime" the dispenser. There is a disk that pushes the product to the top which can become stuck, and you may need to bang the bottom of the bottle 3-4 times on a flat-hard surface to loosen the disk, then pump the dispenser slowly about 15-20 times upside down. After it starts pumping you can pump right side up as normal.
If the dispenser stops working at any time, simply repeat the "priming" step. I do not recommend attempting to dismantle the package. Please note that there is not supposed to be a "straw" in the packaging. If you only opened it once and were able to put it back together, the product should still be effective as long as it wasn't exposed to air for a very long period of time.