1.Customer test: We do leak test for 3 times before packing, if need, we accept all customer's inspection. 2.Printing: Silk screen printing, hot stamping, labeling, etc. 3.Packing: Poly bag in carton, such as 5 bottles per poly bag in carton. 4.Sample: We can supply free sample for you to test quality. 5.Model making: We can produce models according to your own design. 6.Quality guarantee: We have 1:1 replacement for the defective ones. Guangzhou