100 Slot Backpack script

Hey in this server i play on the admins have this 100 slot backpack. i was tagging along with them and i looked inside and there was a ton and i asked how many and they said 100. I was wondering how you spawn a backpack like that. i know its probably server only backpack but if they can get it i can too. please if anyone has any ideas

why even bother with it? who needs to carry that much stuff if you can just spawn what you need, when you need it?

i understand someone who dosnt cheat wanting it tho

So if you ever get lazy you don't have to spawn in any more items... It'll just be there, in your magic backpack.