Uneven terrain can be an issue when attempting to keep your expensive wine in your glass and not all over the ground. That is why I utilize these outdoor wine bottle holder and glass holders to keep my wine safe and my hands free. Picnics in the park, a day at the coastline or just in my backyard, they are wonderful for keeping my glass of wine safe while I take pleasure in various other things. No more drinking from paper cups, I utilize real wine glasses.