Hat box collapsible version for evenings, known as a gibus. They might also include storage space for items such as a hat brush. Designs became quite large during the Victorian era. A letter to "The Times" in 1844 warned travellers that Blackwall Railway's porters had charged a 1d to carry a hat box onto the train and a further 6d for transporting it to the London terminus, with the traveller himself paying only 4d for the journey. He recommended that travellers with luggage should go by steamboat. While traditionally hat boxes are circular or square in shape, some versions may follow the
Top Hat 25 the keel and a displacement of 2580 kg (5688 lb), makes a safe ballast ratio of 48%. The hulls were gun sprayed in two halves, joined down the middle and then steel shot ballast was cemented into the keel. The Top Hat 27 was created to be used in the charter industry. The Top Hat 27 model is in fact an extended the Top Hat. There were 4 built before production ceased. After this Formit was taken over by other interests and started to re-focus their business to other markets . Unfortunately there are no official specifications of the boat.