Have you all seen the Cuppow? I've always loved using canning jars as drinking glasses, but they're pretty difficult to take on the go. Now, you can just attach a Cuppow lid to any canning jar and you instantly have a cheap ($7.99) and cute traveling mug. What a great, eco-friendly alterative to the typical plastic travel mug!
You can hear the rest of the Cuppow story (and make a purchase if you're interested!) here. I love that all the company's packaging, website, and marketing was executed by the designer's friends.