Sippy cups. Who invented them? Probably a wise parent or an industrious and observant engineer who knows how to make money. You know sippy cups. No, not the Stanley Cup (yes - that old chestnut again) or the Diva Cup. Sippy cups are those cups that kids drink out of that make up for their lack of respect for physics and common courtesy.
They're gravity-proof, spill-proof, leak-proof and idiot-proof (perfect for kids of all levels of stability).
In order to make up for my own lack of respect for physics and fake some common courtesy, I invested in my very own sippy cup for adults. It's manufactured by CamelBak and it has caused me to see the light.
Have you ever been in a corporate boardroom and witnessed the variety of water bottles people carry? There are lots. Sigg metal bottles for the people who had a BPA-induced panic attack
Well, both those things have happened to me, and let me tell you - It's embarassing. In the corporate world, you are expected to display a certain level of decorum at all times. Everyone believes that everyone else is perfect and that their only faults have to do with important email from you that they're ignoring or the fact that they are constantly late for meetings. Everyone assumes that they themselves are the only ones who have shameful secret eating habits or other Skeletors in the closet. It's weird.

Anyway...That unreasonable expectation of decorum is the reason I love my adult sippy cup. I facilitate a lot of meetings, lead learning sessions, and offer unsolicited opinions, etc at work and due to the fact that I am required to talk a lot (yes - they pay me to talk), I need to drink a lot of water to keep the whistle wet so the words keep flowing. The less tipping, flipping, unscrewing, re-capping, the better.
My adult sippy cup fits perfectly into the side pocket in my purse/briefcase and although it looks kind of ugly, being environmentally friendly pretties you up by about 20%, right? Like an unattractive guy with a guitar? Always 20% hotter with a guitar. An extra 5% for being able to play it.

What are the chances he knows the chords for "Ramble On" by Led Zeppelin? I'd say the chances are pretty high.
When it comes to the environmental issues our world is facing, I say we should blame it on the birds - they've been using wood as their building material since the dawn of time - they set the bad example. Like Eve was tempted by tree of life, so too was the rest of the human race tempted by readily available building materials that birds seemed to be successfully exploiting with no reprisal. So, next time you see a bird, it better be playing a guitar or else it will be just another wasteful, unattractive bird.