• Single-use, pre-measured powder • Easy-pour pouch is perfect for narrow openings of suction canisters • Snip with scissors and pour in • Red Z contains chlorine to deodorize and control odor Red Z is shelf-stable and does not require an expiration date. For the product to remain shelf-stable, it must be kept in a cool, dry place and in the original packaging. If contents are hard or compact, simply shake the product to loosen before use.