Not all canals were built in Victorian times. Most canals were built between 1750 and 1850 but some were outside this period. There are still around 2000 miles of navigable canals and rivers in the UK.
In Victorian times the ice cream cones were made of glass. They were reusable but with no running water in most ice cream stalls the glass cones were often not washed. This gave rise to the edible ice cream cone.
Glass, it appears solid while in front of you, however over hundreds of years it does slowly sink. Windows from the Victorian times are thicker at the base than they are at the top because of the liquid form of glass, gravity pulls it down.