Bare by Solo 100 percent compostable hot cups are the perfect cups for greening your office. The cups are lined with a vegetable-based coating that is completely heat-stable. The vegetable-base allows for the cups to be 100 percent biodegradable under commercial composting conditions in about 60 days. Also, the paper comes from trees that were harvested sustainably and the cups are Elemental chlorine-free. These cups are affordable, durable and petroleum free.