Waterdropfilter: Love Waterdrop? Care about your friends' water safety? Share the gift of clean water and enjoy double rewards!It's as easy as 1-2-3:1.Share Your Unique Link: Send your friends your unique referral link and let them enjoy a 25% OFF discount on their purchase.2.Friends Make a Purchase: When your friends successfully place an order, they get 25% off, and you receive 25% OFF too!3.Enjoy Double Discounts: Not only do you help your friends improve their water quality, but you also save on your next purchase. It's a win-win!