1. Drink more white water: don't put other liquids in the teacup to avoid cross-contamination.
2. Choose a glass: the glass is chemically inert, will not have any influence on the tea residue, and is opaque, and will not make the tea color look unnatural.
3. Ceramic cups: Harmful substances added in the baking process of ceramic cups may be harmful to human body, so be sure to choose cups with guaranteed quality.
4. Stainless steel cup: Stainless steel cup has no paint film, will not react chemically with tea juice, has long service life and will not release harmful substances.