For security reasons or in case of lost luggage, it is useful to mark your luggage with a sticker containing your personal and contact details (name, surname, phone number and address).
Wrap any items containing liquids in separate sealed plastic bags, so that the content cannot spill over your other belongings, should the glass break. You can get more information about transportation of fragile items from your airline company.
Most airline companies accept transportation of fragile and valuable items under special conditions. You can get information about specific luggage transportation, conditions and prices from your airline company.