cut a lemon in half, squeeze out some of the juice into the container, stick the lemon half inside the container, and close the lid. fruit flies will flock to your citrusy trick and get trapped inside. this will kill all the flies and give your home a pleasant citrus scent.
Explanation: a compound mixture is a mix between two pure substances. Soda water is a variety of mixtures, consisting water, sugar, artificial flavouring and etc.