Refers to a cylindrical hollow object or container, such as a pipe, hose, or a tube of toothpaste.
歯磨き粉のチューブが空になった。
The toothpaste tube is empty.
The tube of toothpaste is almost empty.
このチューブは水道管に使われている。
This tube is used for water pipes.
最後まで使うためにチューブをぎゅっと絞った。
I squeezed the tube hard to use every last bit.
I carry the cream around in a tube.
チューブ is a loanword for flexible tubes like toothpaste or paint containers, whereas 管 can describe rigid or flexible conduits and is used more technically.
tube sock; tube socks
nanotube
polyethylene tubing; polytube
tube top
empire tube
Borrowed from English 'tube'.