Hey all, i know there are plenty of threads on here that explains everything to deal with e-smoking. BUT the only thing that makes me curious is if u buy carts with a taste, can u still add juice to it. I am still waiting on my e-cig to try for the first time. i purchased 5 xtra carts marlboro taste in 16mg and i ordered cool menthol juice 16mg. Can i add the juice to the cart right off the back when i open the package? 