The COBB Tester is equipment used to determine the water absorption of paper, paperboard, and corrugated fiberboard. It has a special no-spill design that allows testing to be done on an executive's desk without spilling water. The COBB Tester measures either the grams of water absorbed by 1 square meter of material in 60 or 120 seconds (Cobb Index test), or the grams absorbed over 30 minutes for waterproof materials. It has a test area of 100 cm2 and includes components like a measuring cylinder, tilting device, and 10 kg non-corrosive couch roll made of mild steel or aluminum.