筒 (Kanji for cylinder /pipe)

Onyomi

TOU

He keeps using that same bamboo cylinder to suck his TOES.

つつ	usually defined as pipe but more accurately, it means cylinder. Chimney, exhaust pipe, drainage pipe, gun barrel, canister, are all 筒. （BOOBOO: unlike the related kanji 管　(tube), which can bend, 筒 is always straight). ★★★☆☆

封筒(ふうとう)

envelope ★☆☆☆☆
封 (seal in) + 筒 (cylinder /pipe) = 封筒 (envelope)

	Meaning	Hint	Radical
筒	cylinder /pipe	HITLER
管	tube	BEURACRAT

HITLER smokes a pipe of hash,

but BUEARUCRATS send messages through flexible pneumatic tubes - like in the movie Brazil.