From the product description, check product page for current description, price and availability:

Makes managing sanitized bottles for a whole batch easy, and lets you get the bottling mess out of the kitchen–no more using the dishwasher rack to hold sanitized bottles. Made by Ferrari Group in Italy.

The Rotating Bottle Tree holds 45 bottles. It will simplify the bottling process. Just rinse the bottles out well after use and store upside down on the bottle tree where they remain clean. When you want to bottle, utilize product B520 (seen below) to inject sanitizing solution, such as Star San or SaniClean, into the bottles to sanitize. Wait 1 minute and bottle. You can also do the sanitizing ahead of time and let the bottles air dry upside down.