Amazon 现在Brita Standard Water Filter for Pitchers and Dispensers, BPA-Free, Reduces Copper, Cadmium and Mercury Impurities, Lasts Two Months or 40 Gallons 滤水器滤芯 4个 原价$21.79, 特价$17.99, 再用 Subscribe & Save 之后, 又可以有 5% Off, 最后是 $17.09, 节省$4.70(22% Off).