The small hornworms will come with very small hornworms and/or hornworm eggs, both of which can be very hard to see and it may seem like you got an empty cup but this is not the case. This is detailed on the description of the small hornworms on our website. If you leave the cup at room temp or warmer for a day or two you will see them become much more visible and begin to grow very quickly into usable worms. These are a specialty item and mainly meant for pets with a need for very small feeders such as tree frogs or tarantula slings, although they can be grown and used for any pet of any size it will just take more time for them to grow for the larger size pets. You are more than welcome to contact customer service and discuss this if you are concerned that you have gotten an empty cup and we will be more than happy to help you check!