This image was adapted from a picture posted to publicdomainq.net. All of the images on this site are in the public domain i.e. CC0. This site is only in Japanese but can be easily navigated with Google Translate. There are *many* cutesy vector graphics images on this site.
洗手（＃2）
clean、faucet、final sh、Fun Flyers、hand+hygiene、handies、hands、healthcare、hospital、hygiene、tap、wash、water
清潔、龍頭、最後的、有趣的傳單、手+衛生、handies、手、衛生保健、醫院、衛生、龍頭、洗、水
資料來源：openclipart ( https://openclipart.org/ )