Safe， non-toxic， activated carbon filter in this Greensaver produce keeper from OXO Good Grips is made from coconuts and is located in lid to absorb ethylene gas to keep produce fresh. slide to open and close vent for optimal humidity levelsremovable basket to be used as a colander to rinse fruits and vegetablesbuilt-in handles on basketchart of the most common fruits and vegetables printed underneath tab shows whether you should keep the vent open or closedfilter absorbs ethylene gas and lasts up to 90 daysavailable in 1.6-quart or 4.3-quart capacitieseach sold separately