Round bottom Beer Mugs

A bar could use round bottom beer mugs to ensure that customers ALWAYS have a beer in hand. Not being able to set down a beer will cause the customers to remember their beers, and drink them faster. The bar will sell more alcohol.

Although this is inconvenient for the customers, it could be leveraged by the bar owner using the popularity/ demand for the particular bar. One could switch to round bottomed beer glasses after their bar became popular, to sell more beer, after there was already a large clientele base.

Alternately, the bar could only use such beer mugs on certain occasions, when they know attendance will be high. Maybe in conjunction with lower beer prices to lure in customers. The bar could also only use them on weekends, etc..

This idea would probably only be useful in a college town, or other suitable venue, where the customers don't sit and talk, but are there to get drunk.

A mug recovery bin would need to be used, to collect empty mugs -- the ones that aren't going to be refilled.

Rings to hold mugs could be at the bar for the use of the bartenders only. (while filling multiple mugs, for instance)

The mug recovery bin should be such that nobody would willingly put their mug into the device if they planned to use it again, or to congregate around it and let it hold their beers for them.