有几种产品买一送一
https://olaplex.com/collections/perfect-pairs-us-1
买4P洗发水送4P护发素，用code：BRIGHTEN
https://olaplex.com/products/olaplex-n-5p-blonde-enhancer-toning-conditioner-us
买4D干发香波，送4D洗发水，用code：WASH
https://olaplex.com/products/olaplex-no-4d-clean-volume-detox-dry-shampoo
买N9护发精华，送干发喷雾，用code：HAIRSTYLE
https://olaplex.com/products/olaplex-n-9-bond-protector-nourishing-hair-serum-us
买新出的睫毛精华，送眉毛精华液，用code : EYES
https://olaplex.com/products/olaplex-lashbond-building-serum-us
