Wonder if this would fit somewhere close to your chest in a quick-open pouch? It would buy you a minute or two (which is huge under water) to figure your way out of the mess...?

•1.7 cubic feet of air
•Tank finish in Neon Yellow for safety
•Easily refills from your own SCUBA tank with included refill adapter (patent pending)
•Easily attaches to your BC with included holster and safety leash
•Small, hands-free, nearly neutrally buoyant
•Breathe on demand regulator -No complicated instructions