Seasoned travelers become accustomed to the occasional discomfort, but now carrying a soggy, slimy bar of soap in a toiletry kit will not be one of them. Sea to Summit's new pocket soap is smaller than an Altoids tin but packs 50 papery leaves of soap that can be used individually. The suds are fragrance-free and work as body wash, shampoo, dishwashing detergent, and laundry detergent. Bonus: It's not a liquid or gel, so stowing it in a carry-on bag for long plane rides is perfectly permissible.
$4.95; www.seatosummit.com