The only disadvantage I can mention is that you need to be careful when drinking. Use a straw if you can. Otherwhise you'll end up looking like Joker from Batman films, the lipstick left on the edge of the glass will stain your face for sure! On the other hand, it leaves gorgeous feminine marks on cigarettes ( I know, what I'm saying is politically incorrect, I myself no longer smoke, but I adore the image of a woman smoking, especially when she's wearing red lipstick like Rouge Odysee!)
Disclaimer: I bought the product myself for my personal use and I am not affiliated with any company. I am not paid to do this review and everything I said here is my genuine opinion.