There is an expiry date for each Created container. It is 7 days. After this period, the items will disappear from the chest.
"Important: a Reward Container will be deleted 7 days after its creation, so make sure to loot it before that happens"
https://tibia.fandom.com/wiki/Reward_Container
Loqhakk - Applying to TibiaQA team as ModeratorJuly 26, 2024
Nareull - Applying to TibiaQA team as ModeratorJuly 14, 2024
Looking for new TibiaQA staff membersJuly 12, 2024