Bags

Bags can be obtained by killing mobs (have a chance to obtain), trading or given by NPC when you finish a quest sometimes and you can open them in your inventory. You can take items from the bag, they are usually foods like peach or Health Potions. There are different types of bags with different color of cloth, like trading bags are with a orange cloth. Also you can obtain chest bags by opening a chest which contains potions and ultrarares. A bag have 3 slots and when ultrarares appear, the 3 slots are often full.
Bags obtained by killing mobs can only be seen and got by the player who kills the mobs.