I just got the Vape-O-Matic Liquinator SS 3ml from Vaporescence and it works damn good. I just filled it with menthol ice and it is so great to have a huge hit on demand. Not sure about other tanks just got this one as my first and very happy with it. Locks onto the carto very tight can spin it on and off just by the tank and there are no leaks. Going to order another when I get my tax returns so I can have 3ml more of another flavor ready to go anytime. Its more expensive but the quality is great.