That is possible but you still have to pay the tx fee. So what you are trying to achieve is pointless IMO.
Well maybe not pointless if I know for instance that I would not use my coins for longer period of time so I put lower fee now when mempool is relatively low, in future if it raises I'd had bigger chance to transfer my coins faster? Or I am missing something?
Thank you for your answer!
That's true. In that case using new address will have the very same result (I thought you think you will just merge them without having to pay the fee).