Gift this multi-purpose Foldaway Tote Bag ($20) to your travel buddy. Great for a weekend getaway, or they can pair with a carry-on for added packing space. Its soft nylon material makes it easily to adjustable. This is also made to be folded and packed. A great travel hack: your friend can take this folded in their suitcase on the way there and fill up with things they buy for some extra space on the way back.