Lush's Big Blue bath bomb. This one is my extreme favourite, for ages when I though I couldn't really use a lot of their products because of my skin I only stuck to this one as it's salt and such, but now I just love it so much.
Dried jellyfish contain collagen which may be helpful for the treatment of arthritis and visible signs of aging. All this suggests that while you're not going to become immortal like the Jellyfish, you will nevertheless gain some youthfulness as a result of eating them. Jellyfish are also harvested for their collagen and this can be used in many beauty products.