The best replacement for glass pipe is bubbler.

The best alternatives to glass pipe are rated as following:
★★★★★  bubbler
★★★★★  metal pipe
★★★★  wood pipe
★★★  metal

Your alternative for glass pipe is not listed? Suggest!
Speaking about glass pipe, one probably shouldn't forget about screen.

Other search terms related to glass pipe and their ratings are:
★★★★★ screen
You have in mind a companion for glass pipe and it is not yet here? Propose!



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glass pipe
bubbler
metal pipe