Thats another point in my effort to replicate the tiny eRoll atty/tank format in a 510. My joye tech 510 dripping atties last a whole lot longer than the eRolls atties but they cost almost the same each the wAy I deal shop and sometimes less. Could be a day when this expense is a real burden and the cig-a-like cuteness form, although fun easy and hands free, might not be worth it