If you use my bottle stoppers, feel free to take any wording from my site to promote them. People understand FDA approved kitchen-grade solid stainless steel with a lifetime guarantee and they understand it will cost a little more. Most also love to know your item is 100% made in America.
Have a sign saying these stoppers can be used for oil and vinegar cruets, bath oil bottles as well as wine bottles. Have an olive oil bottle with a stopper in your display, not everyone asks questions; people will get the idea and maybe even think of other uses which means more sales.