I'm a sucker for good packaging and the Keep Cup people did not disappoint me. Check out this mailer!!
The colors and fun, the packaging is cool, but there's more to the product than that. Keep cups are designed to cut down on disposable cup use. On their website they have a section that helps make the impact of reusable cups personal. I just started and entered 4 times - the amount of times I used my keep cup last week. 5 more uses and I will have saved enough energy to power a light bulb for 24 hours. I'm a grown up and all of that, but even for us big kids it's more engaging to see it presented like this instead of graphs and numbers.
Reusable or not, cool website or not - I would use this if it was hard to clean or left a weird taste in my coffee. It is super easy to clean and my coffee tastes fine. I spend a lot of $$ on my beans - putting them in something that is going to change the taste is a big no no!
Visit http://www.keepcup.com.au/ and check them out. They are an Australian company, but if you're in the USA like me, that's not an issue. They have an order page set up just for us and shipping is from LA, so it's not expensive.