Ive vaped from one just tonight they are pretty good I think.Have you seen a Cubis or Cubis Pro? I think the Cubis has 1 and the Pro version has 2 maybe. Impossible to leak from the bottom because of the cup design and I haven't had any leaks from the top yet even when putting it in a pocket where it can tip or occasionally in the small angled coin/misc dish in my Chevy Cruze in front of the gear selector.