1. Humidity: Tea leaves are easily exposed to humid air, so they should be avoided in humid environment, such as bathroom or kitchen.

2. High temperature: Tea will lose its aroma and taste at high temperature, so it should be avoided to be placed in the sun or too close to the fire.

3. Strong smell: Tea can easily absorb the smell of the outside world, so it should be avoided to be placed with strong-smelling items such as ingredients, perfume and tobacco.