A little help with a waterfall bong

[make it legal]

You've never seen those? I think they're called clickers or something like that. You can pull out the wheel and it makes a great rod for packing joints.

[mfqr]

Be careful about burning plastic. If you inhale those fumes, it can degrade your high. Plus it's very unhealthy.

[invoke]

If it's part of a metal pipe it probably screws on right? Well yeah make the hole a little smaller and start to screw it into the cap and it'll put treads into the cap and you can unscrew it anytime.