You do not always know whether if your staying in a bed-bug infested area while travelling and may cause you to bring bed bugs along with you and your belongings back to your home.

Place one sachet in your suitcase or in the hotel room drawers, hanging garments, wardrobe, under side of the mattress or in between any folded clothing.
When the scent starts to deteriorate about a month later, replace with a new sachet.