Abstract: The following invention concerns a vessel for heating liquids without delay in boiling whereby at least one foreign material is applied, at least at one location on the inner surface of the vessel. The present invention further concerns a process for manufacturing a vessel for heating liquids without delay in boiling, wherein at least one of the following materials, colors, glass and porcelain colors, glue, adhesive, gluten or polymers is applied to the inner surface the vessel by means of a painter's brush, swab, screen printing or as a decal. The present invention concerns ultimately the use of the vessel for heating of liquids without delay in boiling, for all processes in which liquids, especially water, are heated, in the household domain, especially in household utensils, in industrial domains, especially in the chemical industry, and in the laboratory.