This is a great invention that can help prevent abuse, but I'm worried bars won't buy in for a few reasons: 1) I assume the cups have to be disposable, as the

This is a great invention that can help prevent abuse, but I'm worried bars won't buy in for a few reasons: 1) I assume the cups have to be disposable, as the strips probably don't work multiple times. Most bars I've been to don't use disposable cups. 2) Even if they did, it has to be cost effective for the bar to consider using them. If 1000 cups is $250 (0.25/cup) and you can get 10,000 normal cups for that price, that's going to probably factor into their decision. 3) The bar might be worried that having these cups might reflect poorly on their reputation. I can imagine people saying to themselves "Why is the bar using special glasses that detect date rape? Is date rape a problem at this bar?" When you introduce an item like this it might lead to speculation that there is a problem when really you're trying to be safe. It's like if you installed a metal detector at a club and put bars on the windows -- you might be doing it just to be safe, but your patrons might think "do things happen here that warrant security precautions like this"?