Corrion Chest

As dimensional travel became a norm, some brave minds started to gain ideas. And from ideas, inventions were born.
One of these inventions is the Corrion Chest - named after the dimension where it originates from. They work much like Bag of Holding, being much bigger inside than outside, but are stationary. Once you've placed an item inside Corrion Chest, you can pick that item up at any other Corrion Chest in any other dimension. They hold up to 1000lbs worth of items, and only the person who placed the item inside can pull it back out.
No one is quite sure how the chest seems to be able to tell who's opening it, and the people at Corrion have been surprisingly tight-lipped about it...

Corrion Chests are expensive when it comes to personal use, but most portal stations have at least one. They're easily recognized by the pattern in the middle, and from decorative wood-carvings on the lid;