Cosine Additive is an emerging 3d printing company that builds and sells giant printers and 3d printing services. Cosine was started by Andrew and I (Jason), two twenty-somethings who spent their childhoods building machines, rockets, and other contraptions in their garages. We believe these experiences shaped us into the engineers we are today and we are very excited to offer our guidance and help to students in Cosine's internship program.
In the past year we have employed over 40 students from area universities and technical schools. We have taught them all manner of skills from printed circuitboard design, mechanical design through Solidworks, programming in C/C# to operating 3d printers. We are very proud of our interns and the working culture we enjoy at Cosine!
Your purchase of 3d printed parts through our Etsy shop goes directly to fund our internships. Not only does it provide the dollars necessary to pay intern wages, it gives them example parts to design, setup and print. The side benefits of managing a small Etsy store, interacting with customers and getting a taste of what is involved in running a business, are a bonus!
Thank you for checking out our store!
-Jason Miller
President, Cosine Additive
Featured items
All items
Reviews
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Sarah on Feb 26, 2026
5 out of 5 starsPerfect little planter, great details and great price. Shipping was fast as well. My second time ordering from this shop, both have been great experiences!
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Kelly on Feb 16, 2026
5 out of 5 starsAwesome little planter! Great customer service. 10/10 would recommend.
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Ash on Jul 28, 2026
5 out of 5 starsGorgeous moon print!!! I made a lamp out of it, so cool. Shipping was also very fast. Thanks so much!
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Crystal on Jun 5, 2026
5 out of 5 starsThis is a beautifully made plant pot, with great detail! It looks even better in person! Packaged well and shipped quickly.
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Estelle on Apr 18, 2026
5 out of 5 starsI needed another moon and they got it to me immediately. No shipping necessary.
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About CosineAdditive
Shop members
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Cosine Additive
Owner
Cosine Additive started from a home garage machine shop and grew into a manufacturing and prototyping company with a focus in 3d printing.
Production partners
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Cosine Additive Inc
Houston, TX
Cosine Additive is a 3d printing company that manufactures mostly plastic parts and models.
Shop policies
Shipping
Customs and import taxes
Digital downloads
Payment options
Returns & exchanges
Cancellations
Cancellations: not accepted
Please contact the seller if you have any problems with your order.
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