I ordered an ashtray for my cupholder, website also said I needed a retaining ring so I ordered that as well. Turns out that the retaining ring is only needed for automatic trans vehicles, looks like a little round disc that fits in the bottom of your front cupholder that the ashtray snaps into. It only cost like $2.70, not worth returning, thought I'd see if anyone planned on ordering an ashtray and wanted it. I'll mail it to you for free, just let me know.
Toyota part # 74128-02020