How to Create a Water Bottle Using SOLIDWORKS
3D CAD software is an important tool for engineers. It allows them to be able to model their parts without using actual materials, so they can see how they might be manufactured, how they fit in with other parts, and how they look. This tutorial goes through some simple SOLIDWORKS tools while creating an item you're no doubt familiar with, a water bottle.
Part 2Creating the Sketch of the Bottle

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Then click "Sketch".
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Click on it.
The top plane is used because the 3D model will be made from the bottom, so you want to be able to see the top of the bottle when looking down on it. 
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Click on the circle in the 'Sketch' tab, and then click on the point where the arrows meet at the center of the origin.
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Click again to place the circle. (It doesn't have to have a certain dimension at this step). Press escape to stop creating circles.
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Click on "Smart Dimension" in the "Sketch" tab, and click on the edge of the circle. Move the dimension around to the desired location, and click. A small window will pop up for entering a number. For example purposes, enter a diameter of 3 inches, then click on the green check mark.Part 3Adding 3D Features

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Click "Extruded Boss/Base".
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For the sake of example, type in "8 inches." Then click the green check mark at the top of the sidebar.
Use the scroll wheel to zoom in and out. Press and hold the scroll wheel while moving the mouse to move the model around. Part 4Creating the Neck of the Bottle

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Click on the top of the cylinder to select that surface for a new sketch.
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The origin will appear at the center of the top of the cylinder. Draw a circle of any dimension. Press escape to stop drawing circles.
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Click on the edge of the circle and give the circle a diameter of 1.5 inches. (Refer to Part 2 Step 5 for how to create smart dimensions).
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Set the distance to be 1 inch, and click the green check mark.Part 5Adding Fillets

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Then click on the edge as highlighted.
If you click on the wrong edge, press the red x next to the green check mark to start over. Before beginning again, click off in the white space to deselect anything that was selected accidentally. 
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Then click the green check mark.
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This time, click on the outside edge of the bottle as shown.Part 6Creating the Cap

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Create a circle that is 1.6 inches in diameter. Don't forget to add a smart dimension as well (Step 2 Part 5 for reference). 1.6 inches will be slightly bigger than the neck of the bottle. This represents the cap.
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75 inches (Part 3 Step 1 for reference).
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Use the scroll wheel to zoom in and out, as well as press and hold the scroll wheel while moving the mouse to move the model around.