Generate Low-Poly Glass Bottle With Blender Python API For Website

Create a Glass Bottle in Blender Using Python and Display It in the Browser

In this beginner-friendly tutorial, you will learn how to:

• Generate a 3D glass bottle in Blender using the Blender Python API
• Export it as a .glb file (GLTF Binary format)
• Display the model in a web browser using <model-viewer>

If you are just starting out with Python, this is a great way to combine code with visual creativity.

What You Will Need

• Blender (any version above 3.0)
• Python (comes bundled with Blender)
• Basic knowledge of the command line
• A text editor like VS Code or Blender’s built-in text editor
• A browser that supports WebGL (Chrome, Firefox, Edge, etc.)

Step 1: Generate the Glass Bottle with Blender Python

Create a new Python script called glass_bottle.py and paste the following code:

import bpy

# Clean up existing objects
bpy.ops.object.select_all(action='SELECT')
bpy.ops.object.delete(use_global=False)

# Create bottom (body) with a UV sphere (scaled)
bpy.ops.mesh.primitive_uv_sphere_add(radius=1.0, location=(0, 0, 1))
body = bpy.context.active_object
body.scale[2] = 1.8  # elongate vertically

# Create neck with a cylinder
bpy.ops.mesh.primitive_cylinder_add(radius=0.3, depth=1.0, location=(0, 0, 3))
neck = bpy.context.active_object

# Join neck and body into one mesh
bpy.ops.object.select_all(action='DESELECT')
body.select_set(True)
neck.select_set(True)
bpy.context.view_layer.objects.active = body
bpy.ops.object.join()

# Shade smooth
bpy.ops.object.shade_smooth()

# Add glass material
mat = bpy.data.materials.new(name='GlassMaterial')
mat.use_nodes = True
bsdf = mat.node_tree.nodes.get('Principled BSDF')
bsdf.inputs['Transmission Weight'].default_value = 1.0
bsdf.inputs['Roughness'].default_value = 0.05
bsdf.inputs['IOR'].default_value = 1.45

body.data.materials.append(mat)

# Add cork mesh: a cylinder
bpy.ops.mesh.primitive_cylinder_add(radius=0.18, depth=0.3, location=(0, 0, 3.55))
cork = bpy.context.active_object
cork.name = "Cork"

# Create cork material
cork_mat = bpy.data.materials.new(name='CorkMaterial')
cork_mat.use_nodes = True

nodes = cork_mat.node_tree.nodes
bsdf = nodes.get('Principled BSDF')

# Set cork-like brown color
bsdf.inputs['Base Color'].default_value = (0.6, 0.4, 0.1, 1)  # brownish
bsdf.inputs['Roughness'].default_value = 0.7

# Assign material to cork
cork.data.materials.append(cork_mat)

# Smooth shading
cork.select_set(True)
bpy.context.view_layer.objects.active = cork
bpy.ops.object.shade_smooth()


# Export as GLB
bpy.ops.export_scene.gltf(filepath='glass_bottle.glb', export_format='GLB')

Step 2: Run the Script in Blender via Command Line

To execute this script without opening Blender’s GUI:

blender --background --python glass_bottle.py

This will generate a file called glass_bottle.glb in your working directory.

Step 3: Display in Browser Using <model-viewer>

You can now display the 3D bottle in any modern browser using the HTML snippet below:

<script type="module" src="https://unpkg.com/@google/model-viewer/dist/model-viewer.min.js"></script>

<model-viewer 
  src="glass_bottle.glb"
  alt="A glass bottle"
  auto-rotate 
  camera-controls 
  ar 
  style="width: 600px; height: 600px;">
</model-viewer>

📸 Screenshots & Screencast

Related Learning Resources

If you would like to go deeper, check out my books and course:

• Book:
  Learning Python (Beginner-Friendly)
• Book:
  Mastering Blender Python API
• Course:
  Learning Python

Need Help? Book a 1-on-1 Session

I am available for personalized online Python tutorials, including Blender scripting:

Contact Me Here

Thanks for following along. Let me know in the comments how your 3D bottle turned out, or what you would like to build next.