Kristian Troy, who often travels to Bali, says he has found a "plastic bag color code" in which businesses give different colors of plastic bags to different consumers, and the standard is whether they will cut prices in order to send messages to other businesses.

据《每日邮报》报道，来自世界各地的旅行者称，不只是巴厘岛的商贩们在这么做，泰国、越南、墨西哥等地同样有类似的“塑料袋颜色密码”。

In an interview with the Australian version of the Daily Mail on Wednesday, Kristian Troy said he often travels to Bali and discovered the secret more than 30 years ago. "if you give you a red plastic bag, you don't want to bargain if you want to tell other businesses," he said in an interview with the Australian version of the Daily Mail on Wednesday. If it's a black plastic bag, it means you're a good bargain. "

Similar to black plastic bags, Troy said, there are white striped plastic bags, all for bargain-friendly tourists. "at first I was skeptical, so I did an experiment, and when I started buying something in a store, I soon bought it and didn't cut the price. The boss really gave me a red plastic bag, and I wasn't happy. Then I went to another store and bought the same thing, but after a long cut, I got a black plastic bag. "

"our driver told us this and told us not to take red plastic bags," Troy added.