It's important to note that using a vacuum cleaner or any other device on your nipples for the purpose of trying to make them bigger is not a safe or recommended practice. There is no scientific evidence to suggest that using a vacuum cleaner or similar methods will increase the size of your nipples.
Attempting to manipulate body parts in such a manner could lead to serious injury, bruising, or damage to the tissues. The nipples are sensitive and delicate structures, and any misuse of devices or extreme pressure could be harmful.
If you are concerned about the size or appearance of your nipples, it is best to consult a medical professional or a plastic surgeon. They can provide you with accurate information, assess your individual situation, and discuss any potential cosmetic options that may be appropriate for you. Remember, safety and health should always be the top priorities when considering any changes to your body.