I'll show you how to easily clean a bottle, bottles, or wine bottle—the simplest and most effective method. I'll also show you how to clean a large bottle with a narrow neck. The container is easy to clean: just drop a drop of dishwashing liquid inside, add a little water, and shake well, with the neck closed. If this doesn't help, sprinkle some gravel or pour vinegar into the bottle, adding a few pinches of coarse salt. Shake the container well again.