didn't the previous Raikage tried to seal the Hachibi inside of a " pot ", with chains etc.. ?!?!
I find the picture, click spoiler:
It does exactly what the gourd did with Samui.. and if this POT is one of those weapons, then I understand why gin- kinkaku don't have it. It seems like the gourd is doing exactly what the pot does, but holding the gourd seems more effectively in combat, then wielding such a huge pot with you
AND the pot was probably needed in Cloud Village for emergency situation; Hachibi etc.