What is the correct way to carry an arrangement made in a fragile container

one hand on the bottom and one in the center towards the top

To place one hand under the bottom of the container and put the other one near the opening.

Explanation:

A fragile container is something that holds things and that can broke easily, for example, a container made of glass. When you have to carry an arragement that is in a fragile container you have to put one hand under the container to provide support and the other one near the top part of it to secure it in the position and avoid that it will fall and break.