Tightly Sealed Trunk

Source
Obtained from Fishing with Silverpine Forest, Darkshore, and The Barrens offering the best chance of getting one.

Contents
Could contain around half a dozen different Level 10 to Level 25 goodies, with common ones being Bolt of Woolen Cloth, Bolt of Linen Cloth, Light Leather, and Lesser Healing Potion.

One very nice prize to find for fishers is: