i Recommend the Backpack mod, it is a world of good. it has no negative aspects to it. it would be very helpful
The MT server does not have any modded servers at the moment.
/chest, which is essentially like that, is currently a donor perk.
also why would you need a plugin when you can carry around a ender Chest. Just make sure to have a silk touch pickaxe with yah.
can also use /enderchest perk if ya are a donor...and /chest...XD