To accomplish this, a pot must be filled with water and brought to a boil. Then to clean the outside, a brick or rock is placed inside to cause the boiling water to flow over the sides. However, said rock must be hot because the water must still be boiling as it cascades over the sides. A cool rock would cool the water when it came in contact. A blowtorch can be used if one is available.
Most sodas contain corn syrup.
Since eating corn is a no-no, soda containing corn syrup is also out. Only sodas produced under supervision of a rabbi or other official certified agencies are acceptable. Since pasta is made from grain and not allowed, neither are most frozen vegetables, unless made under supervision. Sorry, no dice. Some also have waxes, oils, and even traces of flour to prevent sticking.