Sender chests

Rather than having the contents player specific, sender chests allow the same content to be visible from any sender chest, anywhere in the world, but by multiple/all players. So if 2 people are playing on a world together and their bases are 3000 blocks apart, they can send resources back and forth by each having a sender chest. The chests themselves would be created from difficult to obtain ingredients. Example - 2x netherite ingots, 1 eye of ender and 6x redstone blocks. They'd bear a resemblance to an ender chest, but be red. If ALL of the Sender chests in a world are destroyed, the contents of the Sender chest is also destroyed. Just for fun, creepers will explode if they get within a 4 block radius of a Sender chest.