Although someone else would have to set it up, if you want to get into promoting, I suggest something like setting up a donation fund for whale charities ... Save the Whales is a logical choice.

You can set up a straight donation, or set it up to adopt a whale one at a time (think it's like $25/whale).

Or instead of this food giveaway thingy (literal food), use that for whale related donations... whale t-shirts, whale totebags, etc are on that savethewhales site too. Or instead of food, give away copies of that Blackfish movie.

I'd guess you'd get more promo mileage for a good cause, than giving away food.