Mayuwater.com appears to be a legitimate website. The company offers a range of water-based appliances and has received positive reviews from customers. The MAYU Swirl device, which is designed to aerate and balance the pH of water, has been reviewed by various sources and customers have reported improvements in water taste and texture. The website also provides detailed information about their products and offers a 2-year guarantee on their devices. Additionally, the company is based in Moshav, Hogla, Israel, and has a presence on social media platforms.