Most large brands such as Huda, Saigon, tiger, etc, have a system in place to recollect the empty bottles, except for danh thanhs bottle I have seen them in different homes collecting dust. danh than do collsect though

Most micro brewers such as Tete, Saigon Cider, etc don't return from s

As for impoted beer, all liquors and wines are typical waste in bars, osutside bars ss, or landifill