One of the most frequently asked questions about drunken driving is whether one can possibly trick a Breathalyzer test. It's an excellent question, as sometimes the outcome of a criminal case depends on the accuracy of such tests, and for much of the last thirty years or so, Breathalyzers have been the most popular blood alcohol content measuring test.
Of course, before the answer comes the disclaimer. You shouldn't need or want to beat a breath test. You shouldn't be drinking and driving in the first place. Seriously. DUIs cost thousands of dollars for convictions and sometimes even for acquittals (most lawyers aren't free). A cab is probably going to cost less than $100, even if you've got a ways to go. Plus, you're far less likely to kill someone riding in the back seat of a cab.