Gel Tube

Gel Tube is a collectible item that can be crafted and also found scattered throughout the game world. It appears as loot in several late-early and midgame areas, including Bio Lab D, level 2 of the Office Sector, and the first building in Voussoir. It can also be obtained indirectly when an Anomaly is allowed to fully deteriorate, at which point the Anomaly turns into a Gel Tube.

Because it is both craftable and naturally spawned, Gel Tube is one of those items players can reliably stock up on once they know where to look. The Bio Lab D and Office Sector placements make it a useful pickup during normal progression, while the Voussoir location provides another guaranteed area to check when exploring that region. The Anomaly interaction is especially notable, since it means a player who is willing to leave an Anomaly alone can convert it into a Gel Tube instead of dealing with it immediately.

A few practical notes are worth keeping in mind:

• Gel Tube can be acquired through crafting, so it is not limited to world pickup.
• It is found throughout the game, with confirmed locations in Bio Lab D, the second level of the Office Sector, and the first building in Voussoir.
• Fully letting an Anomaly deteriorate will transform it into a Gel Tube.
• As of version 0.9.2.12333, Gel Tube does not emit light after loading a save. Removing the item and equipping it again fixes the issue.

The save-load lighting bug affects light-emitting trinkets in general, and Gel Tube is among the items impacted. If its light stops working after reloading, simply unequip and re-equip it to restore normal behavior.