KUALA LUMPUR, June 8 — To celebrate World Environment Day, Korean cinema chain Lotte Cinema decided to fill up any reusable container with popcorn for 6,000 won (RM22).

Korea Joong Ang Daily reported that the only condition was the container must have a lid.

Seoul-based freelance journalist Raphael Rashid tweeted that people brought massive buckets and even kimchi jars for the offer.

"People took the promo very seriously,” he said in a subsequent tweet.

Raphael speculated that Lotte Cinema was competing with its rival CGV which recently offered cement bag size packs of popcorn.

Twitter user @EdelweissEden noticed that some even brought along a trash can.

"It will all go to waste eventually. Just bring the normal container,” the user tweeted.

@OkapiFire tweeted unless they have a giant family, how are they gonna eat all that before it goes stale.

@hyoondae tweeted the purchase would eventually clog up the sewer treatment ponds.