ball applicator interesting but ineffective leaked a lot in shipping [SEP] this is one of those things where i cannot really tell if it is working for a long time so i am not even going to comment on the benefits of the serum itself since i did not notice any de puffing or improved skin tonewhen i received this the little storage pouch was damp which i thought was odd i opened it and there was a little moisture around the cap which was also sealed in plastic now i live in denver so i am not really sure if the leakage was caused by the the item being moved to higher elevation we are used to that kind of thing here but i do not really know how much of the product i lost due to leakage i can say for sure though that at just ml for the whole bottle i lost at least of the product and i think it is a safe guess to put it between or moreas for the ball roller i found it uncomfortable to use on my eyes so i actually just rub it on my finger tips and apply it from there i do feel like that prevents over usage as i have had with other hyaluronic acid creams which tend to go a long way and can be hard to use as sparingly as is appropriatebottom line the roller ball applicator is a novelty but i would not order this one again