This is my travel mug.

It is a thing of beauty.

Is LOVE too strong a word? 

It gets me a large coffee for the price of a medium, it has no paper waste, and it is sleekly curvaceous. Therein lies the problem. Now, I am no Aerospace Engineer, but I am acutely aware that when a top-heavy container rounds a corner at any rate of speed it falls over. Every travel mug I've ever had is heavier at the top than at the bottom. I get that this is so the cup can fit in a variety of cup holders, but if one more cup falls over and spills hot coffee on my leg as I'm turning a corner I may have to return to disposable to save my sanity. I find it hard to believe that I posess a greater understanding of physics than the Travel Mug industry.....Please tell me this happens to you too......