I’m about to buy 2 bottles of 30 ml Maxi White serum (kojic acid) and one 30g IKB gel. I plan on mixing all 3 with a regular lotion, probably Vaseline Intensive Care lotion. Is 400 ml a good size? Do you recommend a different base lotion and different size?
Also, how do I mix it? Is a plastic or metal spoon okay? Do I need something specific like a wooden stick?
Thank you <3