醤油鯛 ランチャーム
Literally translating to "soy sauce fish", these are the tiny fish-shaped [[soy sauce]] [[bottle]]s that are often packed into Asian cuisine takeaway meals. Gradually becoming less common nowadays due to plastic waste concerns.

They were originally invented by the Japanese company "Asahi Sougyou":[http://www.asahi-so.co.jp/lunch/], which still makes and sells them under the "LunCharm" brand name.
shouyudai