Ya, me too. Love my Siren 2 as well. Even thought now the top cap is kind of loose. I put it sideway fill with ejuice, no leakage after a night a sleep. Only worry now is it being accidnetly open when I put in my my pants. Just wonder how many o'ring piece does the top refill cap has?I LOVE my sirens to and they don't leak. Glad you are having a great experience.
Anna