Bloon Containment Unit

"Bloons caught and destroyed in Engineers' Bloon Traps are safely disposed of in the Bloon Containment Unit."

- BMC Steam description

The Bloon Containment Unit is the Special Building required for allowing research the Bloon Trap upgrade.

Trivia

 * The building in the Flash version appears to have trapped Red Bloons, while the mobile version appears to be a large glass building with a wider variety of non-MOAB-class bloons, including camo bloons. Ironically, Bloon Traps in the mobile version do not trap Camo Bloons unless the traps themselves are under Camo Bloon detection.
 * The building in the mobile version displays a BTD6CamoRainbow.png camo rainbow bloon, a Blue Bloon.png blue bloon, a BTD6RegrowRed.png regrowth red bloon, a Green Bloon.png green bloon, a Ceramic Bloon.png ceramic bloon, a BTD6CamoLead.png camo lead bloon, a White Bloon.png white bloon, a Zebra Bloon.png zebra bloon, a Lead Bloon.png lead bloon, a BTD6CamoPink.png camo pink bloon, a Camo Blue.png camo blue bloon, a BTD6CamoBlack.png black bloon, a BTD6RegrowBlack.png regrowth black bloon, a Camo Bloon.png camo green bloon, a Yellow Bloon.png yellow bloon, a Black Bloon.png black bloon, a BTD6RegrowWhite.png regrowth white bloon, a Rainbow Bloon.png rainbow bloon, a Pink Bloon.png pink bloon, a Camo ceramic.JPG camo ceramic bloon, and a Red Bloon.png red bloon.