Preparation method: First use a hair dryer to peel off the sticker while blowing, then remove the bottle cap, then use a pen to draw a curved pattern, and use a drill to neatly make small holes along the pattern line. Finally, cut them off one by one along the small holes. A hollow vase is made.

Of course, everyone knows that it is easier to hollow out by hot ironing, but during the production process, plastic will emit toxic gases that are harmful to health, so this rigid and primitive method was adopted.