Green’s Dictionary of Slang

saxophone n.

also Chinese saxophone

(US drugs) an opium pipe.

[US]D. Maurer ‘Argot of the Und. Narcotic Addict’ Pt 1 in AS XI:2 125/2: saxophone.An opium pipe.
[US]Monteleone Criminal Sl. (rev. edn).
[US]Anslinger & Tompkins Traffic In Narcotics 314: Saxophone, Chinese saxophone. An opium pipe.
[US]J.E. Schmidt Narcotics Lingo and Lore.

In compounds

Gatorade saxophone (n.)

(Aus. drugs) a cannabis pipe consturcted using an empty plastic Gatorade bottle.

[Aus]Betoota-isms 121: Gatorade Saxophone [...] 1. A homemade bong 2. A apparatus used to smoke marijuana, usually constructed with a garden hose and an empty Gatorade bottle.