If she flies, she has to have everything in a quart-sized plastic zip bag, no? If she is able to take the train or her own car, then just check with her or someone who knows, if you want to keep it a surprise, make it a little wider than the tallest bottle she uses, then make the pockets a little wider than the bottles, see if you can get an empty one out of her house when she isn't looking, or buy one to put in there, use it to make your template. not really hard, just make enough pockets to hold everything she will need, hair stuff, lotions, toothpaste/brush, etc., make pocket piece between 1/2 and 2/3 height of roll, bind, stitch pocket widths, attach tie or button/loop - use your imagination and you'll do fine!