me too ^^^^^^you have nothing to fear, I've done it myself.
I never bothered even with plants outside but it would be a good idea to wrap some paper around if your worried. It's fun to be able to see the root growth progress daily.just make sure no light can penetrate the bottle. tape it with duct tape all over. then your plant will be fine. if light can penetrate it, it will fuck ur roots.
i've done it tooI heard you could but im afraid ill ruin my baby ganja but I really dont have any more pots nor money and just enough soil to fill 4 2 liter bottles.![]()