I have been asked “what is the difference between the ampoules and vials.” HCG is packaged in two ways: ampoules and vials. Ampoules are all-glass containers that need to be broken in order to get to the HCG. vials have a rubber-cap, which allows the HCG to be accessed with a needle. I have a few videos on my website showing how to use the vials. That is what I use. One way is to use a needle to remove the hcg. Another way is to totally remove the silver cap and rubber top off of the Vial. I show how to do both ways in my videos. This information is for sublingual use only.