Please read more on In Search for the Perfect Cup part 1 for more information.

They may be very easy to wash hand or in the dishwasher, but after being exposed to humid environments, the coffee may taste flat and stale. The best material out there—but definitely not the least expensive—is polylactic acid or PLA. It is a sugarcane- or corn-based biodegradable plastic. But does the surface dent when dropped? In terms of durability, nanometer polymer is great, being 7 and 27 times more wear-resistant than steel and copper, respectively. Such materials, including HDPE, are very advanced and health-friendly types of plastic. Most likely, suppliers will highlight these characteristics upfront. Lastly, test your personalized travel mug's anti-leak auto stopper, rubber suction cap and thermal walls to see for yourself how up to par they can be.

Portability is also a major determinant. Equip yourself with important statistics: weight, shape and size. Sweatiness should also be considered. A personalized travel mug shouldn't put your iPod in peril when these are sharing the same purse. Does the mug's mouth prevent or promote spillage? Can you sip from it in a moving car without ruining your silk top for life?

Design sells. If you'd be too ashamed to carry your personalized travel mug, what do you think are its chances of being used? The ideal personalized travel mug will be an attractive lifestyle accessory that enhances the gym, the airport, the boardroom, your car and, most importantly, yourself. The personalized travel mug is, in fact, a gadget—and you know how gadgets look like nowadays. And as with gadgets, make sure logos are not too glaring if you're giving away personalized travel mugs. Users should not be forced walk around like billboards.

Take down notes then compare these with those for another personalized travel mug. Take down notes again, and keep testing other personalized travel mug designs until you find the one that performs best. When ordering over the Internet, make sure the supplier gives personalized travel mug samples so you can do this test. If not, good luck, find someone else.

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Remy is a Promotional Adviser specializing on Customized Napkins, Promotional Water Bottle, and Cheap Mugs