Gollaon shook his head. “Why is he even trying? That will never fit in that small bag . . . Well, I’ll be.”
Voddick laughed. “Those are quite popular where I come from. Sometimes they have competitions to see how much they could fit into a bag.”
“Really? And how much could be fit into one?”
“The most I saw managed was a small cart.”
“My goodness.”
Untearable Bag
These bags start as normal-seeming pouches, but as things are placed into them, the bag expands to contain the items put inside. There is an upper limit but it is a challenge to reach.
Sea of Stars RPG Design Journal 