Generally speaking, you can take it with you, as long as the size is not too big. Besides, diet pills are not liquid, but when it comes to losing weight, just let nature take its course and lose weight healthily. Diet pills can only make people fat, generally of normal size. However, the spray may not be portable, depending on the nature of the spray. Non-flammable hydrating spray can be carried around like some small watering cans. However, there are still requirements for carrying capacity on the high-speed rail. Carry-on liquid must be less than 100 ml. That is to say, it can be carried, as long as it meets the standards.