Loading

MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.

Download Now

Rrique

CO2 bottle refill funnel

by Rrique Dec 26, 2017
Download All Files

Thing Apps Enabled

Please Login to Comment

This is brilliant! I don't own a sodastream yet, but was looking into getting one, and if i get to do a bunch of DIY stuff to my own, I think it'll make me want one more. What is the co2 capacity of those tanks? As ChipmunkPOWER said, it would definitely be worth measuring, or even underfilling slightly just to avoid over pressurization. How much dry ice do you add?

How much dry ice? The reason this works is dry ice is solid and has weight to it. The bottle that you are filling has a weight capacity on it. Use a scale and add according to the capacity of the bottle you are filling. I'm reasonably certain that (as with most pressure vessels) the bottle has a significantly higher pressure capacity than the valve, although this is only my working assumption. Proceed at your own risk. I don't know how the factory refills these and the temperature shock of using dry ice may deteriorate the valve assembly and seals. Inspect and replace as necessary. I have had to do exchange on one of my bottles that had a bad valve.

By the way, at the first glance, I taught this funnel was a joke. How can you "fold?" CO2 gas back into this bottle!
C'mon I just saw a Thingiverse "chicken denture" few minutes ago.... so I was just laughing still!

But then I stop and read a little more... well, this is simply brillant!

What is the price of dry ice your area? What is the price for a refil (with your method vs SodaStream official refil)?

A little dangerous if too much pressure is build up, but clever idea!

Alex from Québec, Canada

Dry ice runs approximately $2/lb. The bottle holds just under 1 lb. (14oz.) Refill from the nearest retailer 15 miles away is approximately $15. So, yes the small risk is worth it. I refill three bottles at a time, easy math $$$$$.

I'm not suggesting these types of projects are for everyone, but for those that do the research and understand the risks, the financial savings can be rewarding. Do your homework, have the proper tools and safety precautions in place before you attempt any activity that has explosive risk. This is only one tool that I have found very helpful.

We have roughly the same price per lbs. It is 65$ (canadian dollars + 15% txs) for 25lbs pellets. However, according to their website, we cannot buy a smaller quantity. :(
For the safey aspect, I'm an analytical chemistry technician, hazmat and certified explosive specialist (yeah, for real!!!)... It makes total sens to weight 1 pound on a balance to get on the safe side.

I will go into the dry ice store, I will try to convince them to sell me a smaller qtt of CO2 pellets.

Thank you for sharing!