This is the Ross Canister System, without the accompanying bagpipe bag.
Ross Canister System
The New Ross System: The new canister design enables the canisters to be connected and removed with much greater ease. Inside the canister there is an extra 50% more space for granules for the bass drone, which requires more drying than the tenor drones. Air-flow to each of the drones and chanter can be regulated to allow extra moisture to pass through via external colour coded.
The canister is the major part of the moisture control system. The basic concept of the canister system, is that the air must pass through the canister filled with drying granules prior to reaching the reeds. This canister system, combined with the highly breathable bag, offers pipers the best available means of controlling moisture, which means much greater stability of tone and longevity of reeds. The type of granules used in the Ross Canister system is unquestionably the most efficient moisture absorbing material that can used over and over indefinitely, hence the best method of keeping wet reeds and drones at bay. Drying the granules is achieved by placing them in a microwave for a few minutes. A second canister is provided with each complete setup, which provides pipers with a reserve canister for competition days, or long playtimes if needed. There is now a method of being able to allow extra moisture input to the reeds, for chanter reeds and bamboo drone reeds. This is done by rotating color coded rings located on the bottom lid.