Idea is to make Treasure chests craftable. It would work same way like opening chest, just the other way around. If you have items, you can make chest. Helps to save inventory. And you have to use the key to open it again.
Developing idea further can think about possibilities to make some new craftable chest tradeable. Lets say 1 chest contains 1000 of items. Some players buying 10k, today I saw player asking for 100k of items. To buy 10 chests containing 1000 Mushroom Paste each (or Leather, or OJ, or Nets, depending on needs) would feel less stressful than buying 10k of these items. And smaller mailbox players wouldn't feel excluded from buying bigger amounts. Might add new keys to open such chests.
