The Boon STEM Drying Rack Accessory – Teal & White blossoms out above your washing up, an ideal addition to PATCH, GRASS or LAWN drying racks. The Boon STEM is a drying rack. Green. Clean. And made to be seen. Wish your LAWN or GRASS countertop drying rack had a bit more room? Try a little flower power. Plant Stem in the middle and use it to hold small, just-washed parts while you free space below for drying bigger items. BPA-free, Phthalate-free and PVC-free.