Its a cool looking bottle but it is relatively common.
The United Drug Co was an attempt to change public perception about certain druggists (Rexall) at a time when there was a lot of distrust of many druggists and patent medicine proprietors.
Its neat to learn the history of bottles and the companies that used them and the people that used them. Its a beautiful bottle and i am so glad i bought one. I love it rare or common. If i only collected rare bottles, i wouldn't have any! LOL.
I am sorry to say i don't have it. I didn't know it had one. I just assumed it had a cork. Maybe someone else knows. I would love to see a picture of it.