I know there has to be an organic way...especially since I see only one other Tupperware website at the top
When I do a search of tupperware in google I do aso see one site listed within the top ten that is an affiliate site similar to yours - (along with a bunch of popular authority type sites) . A couple comments/suggestions -
1) Try to make your site as unique as possible from all the others offering the same the thing.
2) Links (good ones only) from other websites to yours can influence organic rankings alone. For example, with your signature file here you current just have url in text. If it was a link it would be more likely to help your exposure in the search engines . See here
for help with sig. Compare the link popularity of your site versus that one other site that does rank in the top ten. That might be a big difference in play.
3) On your site's homepage you've listed out a ton of tupperware keywords in a long list. I think it is good to incorporate the keywords you want to target within the search engines, but it is not good just to provide a long list of those keywords. They shoud be naturally incorporated within the sites content.
4) You may want to consider targeting less competitive keywords than just tupperware alone to get started. While I understand that is the prime keyword, are there other keywords people may be searching and be interested in what you sell?