It can be obtained by fishing in the small pond on your farm, or randomly from the other rivers and lakes.
Although, upon first view, this item is a complete throw-out, however, item, along with other junk items, has a purpose.
Use of Trash – & Other Junk Items
- Trash (and other junk items) can be placed into a Recycling Machine. After some time, the trash you once put in the machine will turn into something new such as common ores, torches, and refined quartz