Does the glass ever leak or the base come off?
This is really rare. Maybe 1 in 5000 glasses has a glitch. Every glass is checked at each part of its journey from bottle to gorgeous glass. Both the surfaces of the neck and the base are ground to ensure a perfect fit. Just occasionally the bottle itself is a bit wonky or one of the surfaces is not quite clean and then we might get a gap in the join. Usually our quality checks spot any glasses like this. We will replace free of charge any glasses that are not top quality or break. Just give us a call and we will send out a replacement glass.
