The court issued an arrest warrant against another trader, Musyoka Musembi, who was released on Sh9000 police bond but failed to turn up in court.
The court directed the bond he had deposited with police be forfeited to the State.
Two vendors, Francis Kyalo and Hassan Charo arrested during the crackdown were also charged with using the banned flat bags.
They were found using the plastic bags to store fruits at Saba Saba.
The court directed that the plastic materials produced as exhibits in the cases be destroyed by Nema officials.
The magistrate warned the accused will be heavily punished should they be arrested again with the banned plastic bags.
“On Wednesday, this court discharged some 11 suspects and opted to fine you Sh5000 each but if anyone is found committing a similar offence, they will have to pay heavy price to send a strong message to the rest of the public,” said the magistrate.