Twelve individually wrapped 30% DEET repellent wipes.

Wipes are the answer to three different problems: a bottle that might leak in a pack, applying repellent to a child's face without spraying it, and carrying just enough for a day trip.

Each wipe is sealed, so they do not dry out and nothing can leak. Drop a couple in a first aid kit and forget them for a year.

Also the best way to apply repellent without getting it on your gear — you control exactly where it goes.