interesting, i haven't seen the bottle stunt in quit some years now, back in my HS days an older buddy of mine did the same thing. he used normal black duct tape for fixing the bottle together, about a single strip always. used bit less soil and had the cut right above the soil line so normal 2" tape did the trick. we also experimented to use a jiffy tab instead of loss soil which worked well with small bottles. nice to see that it is still in useHey cronman, sorry I have not ever water cloned. But if you're looking to clone in cups or something I have a better suggestion. This is the newest in cloning innovations, created by me personally 6/2/07.
Read about it here.
https://www.rollitup.org/newbie-central/13701-1st-indo-outdo-grow-3.html#post163902