The Best Rolling Tray, Overall: Raw Backflip Bamboo Magnet Rolling Tray, $35; ... and the pollen storage section has a tempered glass bottom for easy kief collection.

Side view of the Rolling Tray. The corners of the tray are being held up by a set of 2" metal feet that hold it up. It's not just sitting on the table as a flat piece, it's being held above.