Maxwell Mansion Online Store › Key Chain Opener, MM Logo Key Chain Opener, MM Logo $13.00 Keychain and bottle opener with the Maxwell Mansion Logo. The photo shows two different color variations. Color shipped will be based on availability. Keychain and bottle opener with the Maxwell Mansion Logo. The photo shows two different color variations. Color shipped will be based on availability. Get notified by email when this product is in stock. Quantity: Add To Cart Added!