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I am making a 3D model out of my stainless steel water bottle but I can't get right the carved part on the bottom of the bottle

Hole in Stainless steel water bottle

I tried using the boolean modifier coupled with a bevel and a subdivision modifier but still not what I wanted Attempted result

I used a Triangle made from a plane and a solidify modifier and bevel the sharp top edge to make the boolean. Here are what it looks on my blender file

blender Viewport

And here is the reference image for the bottom part of the water bottle taken by me

Bottom View of the water Bottle

Also since I can't make the edge correct for the bottom part I was worried on how to make the Curved Hole on the bottle Cap (I haven't started the bottle cap so I'm just asking for advice on how to do it)

Here is the reference image for the top and front of the bottle cap

Top View of the Bottle Cap

Front View of the bottle cap

I have no idea on how to make this correctly and I would like some help. Thanks for the future advice and help

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For the bottom of your bottle you can model it, use a Mirror modifier as it is symmetrical, give it enough topology as it will need to be bent, duplicate with an Array, then at last use a Simple Deform / Bend mode to make it turn around 360°. Apply the Array and Simple Deform and remove the doubles.

enter image description here

For the bottle cap it seems a bit more complicated as the cut shape doesn't deform to the center. So what you could do is create a cylinder, only keep a segment, bevel it:

enter image description here

Cut a hole, for example with a Boolean modifier or just some vertices displacements. Extrude downwards, fill the faces.

enter image description here

Create an empty at the center of the cylinder object. Give the cylinder an Array modifier > Object Offset, with the empty as Object. Rotate the empty so that it recreates a cylinder.

enter image description here

Give your object a Subdivision Surface modifier, bring some corrections to the topology in order to sharp the edges etc.

enter image description here

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  • $\begingroup$ "The topology game is strong with this one..." $\endgroup$ – Jachym Michal Jun 9 at 14:28
  • $\begingroup$ Hello, for the bottom part of the bottle have you used a subdivision surface? Because I tried to model it by myself but I could not get the form right, and also did you extrude the bottom end of your plane? Thanks very much for the help! $\endgroup$ – KaGaks Jun 10 at 0:08
  • $\begingroup$ Hello, yes at one point I gave it a Subdivision Surface, and added some edge loops, moved some vertices to make the modifier work correctly and to have sharp angles. I'm not sure what you mean by "did you extrude the bottom end", do you mean how to close the bottom? Yes make a last extrude. At the end keep a copy of your object with the modifiers unapplied to make sure you have a non-destructive version somewhere, apply the modifiers, remove doubles, etc... $\endgroup$ – moonboots Jun 10 at 1:43
  • $\begingroup$ Yes, I figure that out by myself, thank you, it was a lot of work for me to model the bottom part but I end up with something acceptable, I'm now continuing for the cap. Thanks! $\endgroup$ – KaGaks Jun 10 at 1:59
  • $\begingroup$ Hello, I run in another problem, How should I add the bottom of the water bottle and the bottle cap? I managed to make the cap and the bottom part but when trying to merge the bottle cap with a cylinder using a Union Boolean it merged with a clear seams. How should i merge the loops ? $\endgroup$ – KaGaks Jun 10 at 6:23

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