In my experience with these plants they have many different applications. Braiding the trunks ,training in circular designs , most training is for display…lucky bamboo is not a real bamboo.
They can be grown in water or soil. Once they grow larger over time root trimming is required to keep them visually distinct and vibrant . Water only cannot subsist the plants on a continual basis without constant maintenance.
There are various types of this plant in general it's referred to as "Lucky Bamboo" and all the designs are basic a decorative sales gimmick. Many versions of several designs are available on line.
Below pic of one of one of mine on display in water which serves as a vase for the floral design.
