He's just going to bask in the glory of that reaction for a moment or two. At least before leaning over the bar to steal a shot glass and pick up the bottle she'd gotten down for him.

Until he just can't hold it in anymore.

"Close your fingers around it tight and think the proper password - I bought it new and tested it out already, it's attuned to you already. And when you're done, open it up and shove something in there - it's really for letters and papers but I reckon you could fit any number of smaller objects in there, the length doesn't matter, just the width - then you close the top again and put it away and no matter who gets it where or why, no one can ever open it unless you hold it tight in your hand and think the password."