Bigger on the inside

Despite Demitasse painstakingly wrapping up the valuable but unwanted magical weapons and armour before placing them into Issack, the magical backpack cries out: “Careful beardy!”.
Demitasse isn't offended though. He’s come to regard the enchanted old bag as a friend. An odd, moany, rude friend but a friend never-the-less.
He also understands Issack’s concerns. A sharp object placed within his magical confines, could easily tear a hole in him, thereby destroying the magic that makes him; him.
An unsheathed dagger could kill him in a moment.
After squeezing everything magical inside the haversack, Demitasse looks around…
Although, bigger on the inside, Issack still had to dump a lot of stuff to make room and the bearded cleric is amazed at the ex-contents scattered around.
Bedrolls and blankets. Portable rams and buckets. There’s even a Grappling hook and some Manacles. The list of smaller items seems endless… Fish-hooks and magnifying glasses. Chalks and soap...
Demitasse has to chortle though, when Issack finally spews out two empty, mundane backpacks.
“Well, you can’t expect me to leave ALL my stuff behind!”
The hefty Marlon pouts. “You’re not expecting us to lug all that back to civilization, are you? It’s like, hundreds of miles!”
The bag seems to puff up in response. “Only until we can sell some of this stuff. You think I WANT to be full of magically sharp axes and scythes!”
Demitasse's smile falters though when he notices Sereena shaking her head.
"Don't look at me, boys", she says. "I only see two backpacks."