Bowl (preferably glass or pyrex)
Saucepan that will fit the bowl on top
Alumium or glass pot
Half fill a saucepan with water, bring to the boil and reduce to a gentle simmer.
Place the ingredients into a pouring pitcher, tempered glass or stainless steel jug small enough to fit inside the saucepan and best if the handle goes over the outside of the pot. Carefully place the bowl onto the simmering water.