This is so simple, I'm amazed I haven't used it before. To save yourself lugging a heavy bottle of scent abroad you can buy one of these for a tenner at John Lewis
www.johnlewis.com/john-lewis-perfume-atomizer-10ml/p385356
It's a perfume atomiser where you decant your favorite perfume into this tiny containter. Hardly weighs a thing and it lasted me the full two weeks holiday.