If you've seen the light and graduated from plain, brewed coffee to lattes and cappuccinos, then you know that milk foam often sticks to the insides of your mug and refuses to expedite its journey into your mouth. So, lets line coffee mugs & tall tumblers with teflon so the foam slides right off and proceeds to intensify the enjoyment of your beverage.
Now, the problems you're going to propose and my answers: 1. If you think there wouldn't be a big demand for this because most people don't put frothy drinks in their personal mugs, you're wrong! More people than you think have espresso machines at home and Starbucks gives a small discount if people bring their own mug. Plus, a teflon coating would be helpful for regular drinks too.
2. As far as safety, if teflon is safe enough to fry stuff on in a pan then it is perfectly safe in your mug. The coffee wouldn't be abrasive enough or sitting in the cup long enough to pick up traces of teflon. Just don't clean it with steel whool.-- DIYMatt, May 25 2010 teflon isn't that healthy for you http://www.wisegeek...eflon-dangerous.htm [xandram, May 25 2010] Twice the PTFE Two_20Cups_20Of_20Coffee [AbsintheWithoutLeave, May 25 2010] Teflon mug http://www.zazzle.co.uk/teflon+mugslike this? [xenzag, May 25 2010] Genius. Perfect for minestrone too. [+]-- coprocephalous, May 25 2010 Good idea, I do however, quite like the slow crawl the last of the suds takes to reach my mouth - it's a small earned moment of reward. I fear my gratification may be more instantly satisfied under this scheme, and while I'm aware that this may not be as spiritually rewarding, I'm willing to take that risk in this instance. [+]-- zen_tom, May 25 2010 Not if you wanted to keep your teeth in your mouth, you wouldn't ...-- 8th of 7, May 25 2010 Excellent for coffee stains on the innerards of coffee cups too. In fact, I'll have two. Two cups please.-- blissmiss, May 25 2010 I spray my cocoa mugs with chocolate flavored PAM before filling...-- Arcanus, May 27 2010 random, halfbakery