There is a glitch where you can make items permanent (unless you die and switch stands)
Go to your bank
Store an item (take out item if you had a previous item in then put other item in)
Take out the item (and then put previous stored item in the bank again if you had a previous item in)
DISCLAIMER: When you give the item to another person it can despawn again and when you die and/or you switch stands, it will be deleted.