Great product. I've had cold sores since I was a kid . I carry this product with me all the time. Usually get a cold sore two / three times a year but when I do, I'm ready. Real important, the moment you feel the tingle apply the med. Usually heals the sore in 3-4 days, but better than the normal 8-10 days. Earlier comment stated, do not squeeze the tube, that is correct. Even a slight squeeze you will waist alot. I usually store it (tube) in the prescription bottle that it comes in