[] Test Tube liquid is not visible over most surfaces/items, and is not colorable

The title says it all. Spawning a Test Tube produces what appears to be an empty tube, however the truth is, the liquid within is not drawing over surfaces, unless you hover over the tube while holding Q. The Tube and its liquid are not colorable either, despite the fact the throwable one does have multiple colors.

Steps to Reproduce

Spawn the Tube

What I expected to happen

To see a strange colorable liquid within.

What happened

No liquid visible in the tube unless hovered over in the Q menu.

Notes / Media

Additionally, if we could get a slider to adjust how high the liquid is in the tube, it would be great to add some finer details to a Halloween set.