The Swedish overlay which is used in the majority of my double bubbles is difficult to master as it is reliant on timing, temperature and a lot of practice. Everything needs to be prepared perfectly and then assembled at exactly the right moment. This can be quite a challenge as I am juggling two blowing irons and two bubbles, and need to invert one over the other. It was developed in Orrefors in the 1916 by Edward Hald and Simon Gate when forming blanks for the famous graal technique, so named as it was considered the holy grail of glass blowing. Having spent five years living in Orrefors I naturally chose to learn the Swedish overlay and gave it a kiwi flavour on my return to New Zealand.