It’s a small white pouch that delivers a powerful punch—of freshness while vacuuming. Arm & Hammer Pet Fresh Fresh-ins are small white pouches packed with baking soda that are emptied into a vacuum bag or dust cup. The crystals inside each packet neutralize odors inside and outside the vacuum, by eliminating unpleasant odors and leaving a fresh, clean scent in the air after vacuuming. Fresh-ins can be used with bagged and bagless vacuums and are designed to be poured into each new bag or dust cup. The crystals also eliminate static in the dust cup, making it easier to empty and clean bagless vacuums.