We have been purchasing hundreds of the ChefN EcoCrock and have some modifications we'd like to make so we can begin creating our own EcoCrock variation. The variation must be A STANDARD ROUND CHARCOAL FILTER IN THE LID https://www.amazon.com/Chefn-401-420-120-EcoCrock-Counter-Compost/dp/B006LWR2RU?th=1 3.3-liter (.75-gallon) modern ceramic countertop composter that features a vented lid with a charcoal filter that absorbs odors 12.95 x 6.4 x 8.35 inches Show More