Collocations for tube - noun

fine, narrow, thin
hollow
flexible
closed, sealed
inner (= on a bicycle wheel)
fluorescent (= a kind of light)
cardboard, copper, glass, metal, plastic, rubber, steel, etc.
cathode ray, vacuum
test
breathing, feeding, ventilation
bronchial, capillary, Eustachian, Fallopian, neural, etc.
pollen
torpedo

down a/the tube
She poured the liquid down the tube.

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

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

up a tube

London

catch, go on, take, travel by, travel on
I often travel by tube
I often travel on the tube

line, network, station
carriage, train
I had to cram myself into a packed tube carriage.

map, ticket
driver, worker
journey
my tube journey to work

by tube
I go to work by tube.

on the tube
I bumped into him on the tube.