A fiendish puzzle that may be solved by approaching it with just the right angle, perhaps. My hyper-logical son might be able to break that wooden code. Is there malt whisky inside?
Well, ... there was some malt whisky inside: 12-year-old Highland Park and Writer's Tears.
The security may be high depending 'who' you want to keep out...
Well, just whisk(e)y afficionados.