1. mugs: special mugs with special thermal insulation coating are needed. That is, there is a 7- 15 color-changing coating.

2. Cup thermal transfer machine. Generally around 300-500 sets.

3. Special paper for thermal transfer printing. 0.4 one piece

4. Inkjet printer: an improved printer using thermal transfer ink. Use Epson R230 1450 or so.

Computers are necessary. Configure according to your needs.