It's easy to say trolley. What requirements must our future travelling companion fulfil when purchasing it? Does it only have to be robust (to withstand shocks and abrasions during transport by car, train, plane) and durable (e.g. weatherproof)? Or should it stand out for its sophisticated design (designed with an attractive and trendy look, in addition to the basic functionality of protecting and transporting personal belongings)? Maybe even be smart (offering functions such as automatic weighing, digital lock, GPS tracking), sustainable (made from environmentally friendly and durable materials with low impact on natural resources and the environment during production, use and disposal) or customisable (tailored to one's needs and reflecting personal style and preferences)? As is often the case, the truth lies in a synthesis of all demands: offering protection, the right capacity, durability, comfort, agility, lightness.