Bags of teleportation

These bags come in a set of two and can only be sold as a set of two. These bags act as a bag of holding but if you say their command word the stuff you put in them will teleport to the location of the other bag. Whatever you put in after you say the command word will be teleported to the other bag. When you speak it's second command word, the bag reverts back into a regular bag of holding. These bags are made of very high quality leather and silk rope for their string. These bags are very useful for adventurers who have found a hoard and cant collect it all. With these bags, they can leave one in a bank and all of their problems are solved. If both bags are away from humans for more than 3 days, they will disappear and reappear in a random location on a random person.