I was looking at the ZFM Vapor website and they're selling some carts with a yellow foam looking thing that has a straw. Has good reviews on the website, supposed to keep the atty wet while allowing every drop of liquid to be dispensed out of the cart. Wondered if this works or if anyone has tried it? I drip mostly but I'm hating the new Joye cartos so I'd like to be able to have a cart filled and ready to go when I'm driving. Any input would be appreciated.