Fill your humidifier with HUMI-CARE and rest assured that your precious handmades are safe and sound. This 50/50 mixture of propylene glycol and distilled water is perfectly calibrated to ensure a slow, steady release of 70% humidity. It's easy and works like a charm. Plus, the reasonably priced 16oz bottles offer a lotta bang for your buck! Another great addition to the HUMI-CARE line of products.