clickable variation options

I am building a site for a client who makes gourmet popcorn. One of the products is a tin that the customer can fill with up to 3 different flavors of their choice of popcorn. She would like it structured like this popcorn co.'s "build a tin" (but only with the flavors page - as she only offers one type and size of tin):

The site i am working on is

It doesn't need to be exact but my heading is spinning trying to figure out how to even begin to structure this. There are like 70 flavors, and prices vary depending on which they choose...

Any insight would be amazing....I truly appreciate your help in this matter.