While I can easily make do with one bikini, one beach cover up and two pairs of shorts to see me through a three week holiday, I used to pack everything and the kitchen sink when it came to skincare. You see, you never know when a special firming and brightening face mask will come in handy. And which serum your skin will crave exactly on day five.     And of course someone multi masking regularly needs at least four, better five different face mask options. A week. Which…