Collocations for tube - noun

fine, narrow, thin | broad | hollow | flexible | closed, sealed | inner
(= in a bicycle tyre)

fluorescent
(= a kind of light)

aluminium, cardboard, copper, glass, metal, plastic, steel | discharge, drainage, suction | test | breathing, feeding, ventilation | capillary, bronchial, Fallopian, neural

down a/the ~
pouring the liquid down the tube

in/into a/the ~
I put the poster back into its tube.

through a/the ~
He gave the lamb its food through a tube.

up a ~ 2 the tube
the Underground

London

go on, take, travel by/on

line, station, ticket, train

by ~
I go to work by tube.

on the ~
I bumped into him on the tube.