It also allows the makers to experiment a bit on their own.
I did buy a bit from the "Maker's Shelves" at the Open Day, so I can guarantee this really did happen.
The same shards were also used in the gardens around the studio - in amongst pebbles and shells etc..
A big bubble with coloured stripes all over it, first needs to be blown, before smashing it to obtain the multicoloured stripey shards used. Seascape is considered to be one of the most complex ranges produced.