Tether – Save your stemware. Washing your wine glasses can be risky business, especially when you’re using your dishwasher. Preserve and protect your stemware with Tether, a flexible plastic rod that stabilizes your stemware as it goes through the dishwasher cycle. Tether comes in a pack of four. It’s hollow base slides over the dishwasher post. The end clasp clips onto the wine glass stem. Adjust the rod to fit the glass on either the top or bottom rack of your dishwasher.