by Mr_MegaTronic, published

PhLAsk by Mr_MegaTronic Feb 28, 2013
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PhLAsk by Mr_MegaTronic is licensed under the Creative Commons - Attribution license.

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My new YouTube Channel: https://www.youtube.com/channel/UCnnw56J_TeOsF4M_F5pPPJQ

In the quest for 3D printed liquid containers, the okay just got okay-er!

While working on a different project, I needed to make a part that fit to a disposable flask's threaded opening. So I designed the neck of the opening and printed it to check the compatibility with the existing cap. It worked great so I was able to design that project and move along. But I was left with a threaded tube with nothing to do!

The PhLAsk is just a simple hip flash with a threaded cap. I printed it in black PLA at 220 micron layer height, three shells and 20% in-fill.

I filled it with water and left it in a dish overnight and it looks like there is no seeping. The cap doesn't seal 100% but it does so well enough to keep water from dripping out with gravity. A little pressure will cause a seep though. A gasket will fix this.

VIDEO: http://youtu.be/PK_BjZQtTRw

I have not tested other liquids with different surface tensions but for casual liquid portability, I will be using this little guy!

Bottom's up!

If you like what I do and want to help me do more, please consider supporting me on my Patreon page! http://www.patreon.com/ErikJDurwoodII Thanks!


Print with PLA plastic at .22 mm layer height or denser, three shells and at least 20% in-fill.

Flask goes bottom-up and cap goes top-down!

Use a soft gasket to make the cap seal better.

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The only question, is PLA food or drink safe? I'd assume so because this is a thing, but I don't really want to put my life or sanity on the line to test it.

not so sure it will hold alcohol as it usually melts most plastics. you don't want to drink the actual bottle. great for water if it is pla!

What's the volume inside?


Does anybody know a good food safe expoxy ? It would be good if this would be available in Germany as well..

Many Thanks

Hey man, As this builds I notice on one side (front and back) the walls are solid and on the other there is a slight air space creating an inner and outer wall. I have used both replicatorG and makerware and it keeps showing up (it does swap between the left and right side depending on the software). Ive have also been trying out slic3r, but haven had any luck with it yet. Is this from slicing or do you think it exists in the stl?

i printed 5 so far, they all leak it's leaking under the thread on the plask hmm what could i do to fix this

glue a rubber strip under the cap and on top of the flask where the flask meets the cap using food safe expoxy. use natural rubber, latex free rubber bands for the seal. Cut and melt the rubber so that it is the perfect size O ring. Enjoy!

So should I print it the way it comes in the file or should it be rotated so the neck is facing up?

Print it the way it's oriented in the file. This will cause the layers to form a more effective wall, and you shouldn't need supports, just maybe a raft or brim.

Any idea how far you can scale it down before

Noob tip: play with the extrusion width (in Slic3r at least) to optimize print time. When I was 3 hours into an 8 hour print I figured out that I could have had a 4.5 hour print by changing the extrusion width.

The flask prints neck-down? With no support? Or does bottom up refer to use instructions?

It prints from its base with no support.

For those asking about the effect on booze, I have printed about a dozen of these for friends and all of them were skeptical at first, but all have said that there's no noticeable taste/effect on their libation. I made a couple out of Abs and coated the inside with food safe silicone, and those also work very well.


the real mvp

Nice! :)

A readily available grab-n-go seal is plastic sealing wrap. Been using it for years to ensure drip-free liquid mobility.

you may also try a rubber "O" ring as your seal. it should hold up under high test as well

Is the material ok to put edible stuff in? It would be a shame to have my scotch melt the bloody container and taste like goop. Outside of taste and a waste of plastic, it would be a waste of booze!

PLA is indeed food safe. It's used to make recyclable cups which are a retail product and used in the food industry to replace stryofoam where possible. It's also used to make medical sutures and implants, etc.


Tho make the flask food-safe, the specific polymer grade (there's one than one type of PLA) must be rated food-safe. Also, every part the plastic comes in contact with must be food-safe as well - this especially concerns the hotend, where lead (moodswings), chrome (digestive issues), aluminum (Alzheimer's) and so on, which are all part of the alloys we're using, are heated and might diffuse into the polymer.

PLA is indeed food safe but when you 3D print it it causes millions of micro-chasms that bacteria seem to love so if you clean it good enough it is but otherwise it will get dirty quick.

It's a flask. You'll probably be filling it with alcohol. Probably even a distilled spirit. I don't think you have to worry about bacteria.

Good point.. I'll have to see what the prints look like under a microscope. :)

Good point.. I'll have to see what the prints look like under a microscope. :)

That's a question only science can answer...or experience... Unfortunately have not obtained either. I am curious how the material holds up to "not waters" so I think some tests are in order. I'll probably put some moonshine in this and let it sit for a while.

Oh nice! A high calibre test of hi-test. If only this printer of mine could print copper tubing and glass vats...

I only had to see the name to know this was your doing.