I wish there was a lid I could substitute for the regular fast-food cup lids that are only fitted with straw holes. I have a toddler and if restaurants offered a sippy cup lid option (or I had lids I could carry with me), it would really make life easier!
A line of marinades and spices for grilling would complement the Kingsford/ Hidden Valley brands. And possibly there could be a gluten-free option, as well.
I have many relatives and friends who must avoid gluten, and it's in almost every dressing. It's especially difficult in restaurants, as most gluten free menus focus on salads, but the only available gluten-free dressing is oil-and-vinegar. A line of gluten-free dressings for home use, and a line that restaurants could put on their menus so even the staff would be able to tell the gluten content, would be perfect.
I started using Static Guard to battle static cing in my house this past winter, and I really don't like the smell. Plus, it's an aerosol. I wish there was a non- aerosol anti-static fabric refresher.