Transparent bottle,Material is PETG or PET.Not resistant to acid and alkali. Must be used at car wash soap PH less than 10 White bottle or Black bottle,Material is HDPE,acid and alkali resistant.Very durable.

Transparent bottle is not as durable as white/Black bottle (broken-resistant). But many customer choose the transparent bottle.Because it is more beautiful.And Normal use (No violence) is no problem.