You choose: hinged or stacking! This all wood oil box holds 40 essential oil bottles (5mL or 15mL) as well as 8 10mL roller bottles. Choosing a hinged lid will turn this box into a traditional oil storage solution. However, you can also choose to have this lid stackable. Nest the oil box into the lid where you’ll have room to tuck away your cap stickers, capsules, blending supplies, or anything else you’d like to use regularly without having to clutter your counter.