Launch Illustrator and initiate a new document by pressing Ctrl/Cmd + N. Configure the artboard dimensions to 400x500px. 
For objects requiring symmetrical designs, it’s efficient to draw one half and then create a mirrored duplicate. This method not only conserves time but also guarantees perfect symmetry between the two halves.Utilize the Pen Tool (P) to sketch one side of the bell. 
Select the created vector path with the Selection Tool (V) and navigate to Object > Transform > Reflect. Opt for the Vertical option and click the Copy button to generate a mirrored version of the path.
Maintain Shift to constrain horizontal movement and drag the copy to the right until the upper terminal anchor points align. 
Employ the Direct Selection Tool (A) to choose only the endpoints of both paths. Right-click and select Join from the menu to merge the endpoints.
Close the path entirely. Switch to the Pen Tool (P) and click the lower endpoints to close the shape. Eliminate the Stroke and set the Fill color to red for visibility purposes (this will be adjusted later).
To eliminate the bell’s flatness, divide its shape into segments and apply color gradients to mimic a 3D effect. Use the Pen Tool to draw two arcs as depicted below.
Select the bell shape and one of the arcs with the Selection Tool (V) and access the Pathfinder Panel. Click the Divide button to split the bell shape into two sections.
Keep the object selected and ungroup it (Shift + Ctrl/Cmd + G). Then, select the lower part of the bell and the other arc, and divide it again to create the bottom part of the bell, resulting in three sections.
Utilize the Ellipse Tool (L) to form an ellipse for the bell’s base, ensuring smooth, continuous sides. 
Next, split the upper part of the bell in half for easier gradient application. Use the Line Tool (/) to draw a vertical line through the middle of the bell and align it centrally with the segments using the Align Panel.
Select the line and the upper part of the bell, then divide it using the Pathfinder Panel. Ungroup the resulting object and prepare for gradient application.
Apply gradients to give the bell a lifelike appearance. Use radial gradients for the upper sides and linear gradients for the middle and lower parts, as well as the ellipse.
Create the bell’s thickness by duplicating the ellipse and scaling it down. Apply a radial gradient for realism.
Generate reflections and shadows to enhance the light source’s accuracy. Use the Pathfinder Panel to create a copy of the bell shape and combine it with various parts to create reflections.
Duplicate the green shape of the bell, lock and hide the original, and move the copy for reflection purposes.
Create copies of the bell’s parts and the green shape, then use the Minus Front button in the Pathfinder Panel to create reflection shapes.
Apply gradients to the reflection shapes to create a realistic appearance.
Repeat the process to create additional reflections and shadows, adjusting gradients and shapes as needed.
For the bell’s right side, create reflections and shadows using similar techniques, adjusting gradients and shapes for the desired effect.
Enhance the bell’s shape by defining horizontal curvatures and applying radial gradients to create a strip. Use the Minus Front button to intersect this strip with reflections and shadows.
