Do you need to change the bottle once a year?

You don't need to change the bottle every year. It is not recommended to move and change the bottle at will, so you don't need to change the bottle once a year. Earth treasure bottle is also called Earth treasure bottle and Feng Shui treasure bottle. Dibao bottle can change the indoor magnetic field, dissolve the bad gas field and magnetic field, and is one of the special magic weapons in Tibetan Buddhism. This answer is for reference only. Don't be blindly superstitious.