I don't think Toyota sells them anywhere (I checked Toyota gear sites in the US and Australia which seems to have a lot of Toyota gear for sale). I think they were strictly promotional give-a-ways handed out at the 2010 Prius Reveal shows in Washington DC, New York City, Chicago, and maybe Los Angeles and San Francisco. Because it's small (16 ounces), I don't find it very useful. But I like the way it looks, so I keep it on my desk at home. You might want to post a "WTB Prius Water Bottle" thread, with the picture I posted. I think patsparks of Australia got his by crying a lot.
I almost forgot! We got the little LED ones too - but my husband took those with him to put on his office desk so I don`t have them at home. These are all promotional items, so it`s not that easy to just go and buy one.
I asked the Prius Team, and below is their response: "TMS has some items in circulation at the ride n drives we put on. Other than that, you'd want to ask your dealer if they have anything fun for new owners." I saw this online, it is really cool, check it out: http://goods.ruten.com.tw/item/show?11090803655480 You can preorder this toy in Taiwan.
That's very cool -- a radio controlled Gen III Prius. My guess is that it will also be available on eBay before the end of the year..
