We got a Disney Cars Lenticular Tumbler for only 99p from the local QDs. If you want to make the purchase online, it'll cost you around £2, which is still a bargain price for this product! We've had ours for at least six months now, if not a year, and it's still in great condition. Not bad for a cheap character cup really. If you want to order one online, try Amazon.
What makes this particularly appealing is that it's lenticular (a textured picture that appears to move when moved to different angles). It's a Disney Cars product with a big picture of a racing Lightning McQueen on it, and the slogan 'Nothing But Speed'. It's a large picture that wraps all the way around the cup, which is pretty impressive considering that it costs them more to put a lenticular picture on than just a waterproof transfer or sticker.
There is a word of warning to come with this cup though, especially if you're ordering it online. An Amazon marketplace seller has listed it as a tumbler, but in fact it is a full size pint cup! So this is most definitely not for a two year old then. It's quite easy for a small child to grip, because the picture is textured, but they won't appreciate the size and weight of such a large cup if they're under about five years old.
This is a nice product for Disney Cars fans that's surprisingly well made considering how cheap it is. It's lasted a long time for us so far and it's easy to grip too. I'm giving it four stars, because really it could do with being a bit smaller. That said, I'm sure older Cars fans (and adult ones) will get a real kick out of having an adult sized cup with their favourite Disney character one!