Thanks @StompieZA - 10ml is fantastic! If it had a 21700 battery it would probably be a great thing to comfortably get through all the juice without a battery change. My Reo bottles are only 6ml but you only fill to 5ml to allow space for the little tube to go in. Its a mech and uses 18650 batts so after youve vaped about that tank worth the battery sag is noticeable - moreso on a more powerful setup but even on a MTL tame setup. I am looking to get a regulated squonker that can do more liquid on one battery without noticeable battery sag.