What chemical substances are contained in the color-changing cup?

Physical Barrier (Micro-encapsulation): The color-changing active ingredient is permanently sealed within polymer microcapsules. Due to their enormous molecular weight, these particles cannot penetrate the capsule walls and enter drinking water.

Direct Contact Safety: During custom injection molding, color-changing powder is locked within the plastic molecular chains. In spray coating processes, the surface is covered with a food-grade clear coat, ensuring lips only contact a pure protective layer.

Zero Harmful Additives (Non-Toxic Standards): Premium color-changing cups strictly prohibit heavy metals like lead (Pb), cadmium (Cd), mercury (Hg), and phthalates.