Sydney Sweeney's new commercial venture to sell a product made from her bathwater has been a hit, with the limited 5,000 bars of 'Bathwater Bliss' soap selling out in seconds. The soap, created in collaboration with Dr. Squatch, features a unique scent blend of pine, earthy moss, and city bath water. The product launch caused the Dr. Squatch website to crash due to high demand, with bars now being resold on eBay for up to $2,000. Sweeney's unconventional approach to marketing has garnered attention and praise for its creativity and success.