Dual Beer Mug
When the Mrs. is trying to control your beer intake, only one way to escape it alive. And that one way is by buying this dual beer mug. It is two beer mugs combined into one holder. There’s a valve connecting the mugs on the inside, allowing the beer to flow from the other mug to the mug that you are drinking in, secretly. The Mrs. won’t be able to say anything because “technically” you are just having a glass of beer, the beer from the other glass magically disappears.