Aye aye buddy, I it where me I would be looking towards the GP spheroid. It can swing it in any direction, leave I upside down all day and it won't leak a drop. With it being a full metal jacket it's a solid little thing. I must have been through atleast 7 of them, always got traded because people where where offering nice things for them. But I always ended up going back to them. They hold 2.5ml of liquid. I use one daily at work. I'm a marquee erector. So my work gear does take a beating, dropped, thrown, stood on, lost in fields, but the spheroid keeps on going. Well worth the cost. Plus the flavour and Vapour is perfect.