When the RSVP Compost Pail odor is very apparent, it comes with 2 sets of filters up to 6 months after use. These RSVP charcoal filters are designed to prevent compost pail odors and keep them in your kitchen with no trouble. RSVP Charcoal Filter for Compost Bucket Features: -Works with RSVP compost buckets and comes with 2 sets.] Made to prevent compost pail odor. The RSVP Charcoal Filter is 6 1/4" diameter x 3/4" height, and 1 gallon capacity charcoal filter weight: 1.6 oz.