Favorite souvenir cup, etc?

[wrighteous]

My boyfriend and I went on our first trip together last September, and we are going again this September. I'm thinking it may become a yearly tradition, so I'm thinking of starting a collection of souvenir cups, containers, etc. I don't have any right now other than a refillable mug lol. So I was wondering what some of your favorites were and where they can be purchased? I know they are expensive, but I love that they are unique to the parks and practical for use at home too! Thanks!