What is the cheapest brand of bottled water in Chengdu? The quality should still be good

What's so great about being better and cheaper? The cheapest ones are filled with Longquan noodles from small factories around Chengdu: C Duo, Wahaha, Yibao, Lanyu, Pengzhou: Qiandui Snow Blue Mountain, Liangfengding, Wenjiang: Zhaoxi Mountain Spring. . . ; Quanxing--the water source of Pujiang River is good; Lanjian---Shifang, but now it seems to be bottled in Chengdu---from Pixian County, Sansu---from Meishan, Shangdao Ganlu-- Pengshan Yes, actually, I think the water is better at Quanxing and cheaper: Qianduixue Bar, I used to open a water station