Cat drinking pond

by JohK, published

Cat drinking pond by JohK Dec 17, 2012

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This is a cat drinking pond that takes soda bottles (like coke, pepsi, etc) with a pco028 thread as a reservoir. The water level is kept constant without the need for permanent monitoring on your side.
All corners and edges are nicely rounded so your tippy-toe doesn't hurt itself - also it looks much better.

L**** the cat: "Yay, I can haz water *purr*"

Got inspired by the "pond for small animals", my thing is a complete redesign though.

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The cat in the photo looks like it could be my cat's twin! Coloring is almost exactly the same but my cat would be a little bit older. His name is Cow :)

It's not the corn that will kill you, it's the additives. I've only seen one brand of PLA stating FDA approved for food contact. I'd be cautious of PLA from china or any where the actual manufacturer is not known.

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Print the cat-drinkpond.stl file:
Please make sure to use a "food safe" plastic to not put your pet's health at risk. Extruding the plastic through a brass nozzle might increase the lead content of final product. (Also see the discussion below)
I got good results with PLA, .35mm nozzle at .2mm layer height. I also used 4 perimeters and 5 top layers to make it watertight. You might get away with fewer layers and perimeters, but I didn't want to take a risk.
Then go and find some empty PET-bottle (no pun intended) that has a PCO028 thread (coke bottle, or similar thick-walled bottle). Fill the bottle with water and screw it into the socket of the pond. I would suggest the small .5l or the 1l size at max. any bigger than that and the pond will probably tip over quite easily.
I designed this thing to be massive and survive everyday use: before you print, double check the gcode so you don't waste plastic on a useless non-watertight print.

If you already have a bowl that you like to use with a bottle as a reservoir you can also print the cat-drinkpond-tower.stl, which basically is a stand for the bottle with some openings. You'd have to fix the bottle somehow to avoid that your cat tips it over, though.

I got rid of the "work in progress". The thing is massive and if I need another copy, I will probably go back and tweak the design a bit in order to save some plastic. Until then it works the way it currently is. Also I'm very satisfied with the threaded socket, it holds a 1 liter bottle very firmly.


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minette08 on Apr 12, 2014 said:

The cat in the photo looks like it could be my cat's twin! Coloring is almost exactly the same but my cat would be a little bit older. His name is Cow :)

AntonChigurh on Dec 24, 2013 said:

Half the comments are about the pets health.. I guess these people never seen an animal eat its own crap before.

Smeyer on Oct 30, 2013 said:

They have given warnings about PLA not being food-safe which includes liquids. The composition of PLA and anything that you eat or drink out of it can harm humans and animals. I don't recommend this for anyone's pet.. not unless you seal it with a food-safe epoxy.

Cardsharp on Feb 25, 2014 said:

PLA is corn based, so it is food safe.

quantomiklon on Dec 29, 2012 said:

loving it - I will use the tower for instant water supply for my turtles.

Thank's for the idea!

DDD on Dec 20, 2012 said:

Pretty cool. It can be used also to water the birds outside.
They are particularly thirty in winter.
Definitively something I will print soon !!

odie_wan on Dec 20, 2012 said:

The identity of kitties involved have been redacted to protect the innocent.

yzorg on Dec 19, 2012 said:

PLA will degrade alot faster when wet all the time and sunlight isnt helping on that one too.

JohK on Dec 19, 2012 said:

I did some research into PLA degrading earlier this year and really couldn't find too much about. In essence the results of my research was: PLA is far from environmentally friendly (stuff is used during production! stuff!). Also degrading of small PLA chips in special reactors has a timescale of years.

If you have any more detailed information on this, I'd be really interested.

Yell0w on Dec 19, 2012 said:

Hey i know that cat! I think she lives next door!!!11

JohK on Dec 19, 2012 said:

oh noes.

Lincoln on Dec 19, 2012 said:

There are components of 3D printers that the PLA touches that may make it not safe for your pet to drink out of. I personally would be concerned about the long term effects it could have on a pet's health. I don't think it would be immediately harmful, but could in the long run cause health problems.

JohK on Dec 19, 2012 said:

Hmm not sure about this. If I follow the path of the PLA through the hotend, it would in my case touch the following materials:
-> PLA (cold, guide) -> ABS (cold, extruder) -> Steel (cold, bearing, extruding wheel) -> ABS (cold, extruder) -> PTFE (cold to hot, liner) -> brass (hot, nozzle).
I don't think there is anything transfered to it while it is cold, except there is ABS-abrasion. The hot PTFE contact should be very comparable to your typical PTFE-coated frying pan. Also at the Temperatures below 250C PTFE is chemically stable. Afaik, brass is food safe?

Can you be more specific and elaborate what exactly you are concerned about?

donb on Dec 19, 2012 said:

is it food safe PLA?

JohK on Dec 19, 2012 said:

Is there a european supplier who guarantees food safety for his PLA? To my experience the suppliers are resellers who are unable to tell you the constitution according to the relevant DIN/ISO norms... I wouldn't really trust any "food-safe label" if they can't even recite the datasheet of the original manufacturer.

BUT, this was the only PLA that I have that has zero smell while printing (this is something I learned for children plastic toys: if it smells, it's probably not healthy). Also from the stiff feel to this filament and being the natural type it shouldn't have any flexibilizers in it, which eliminates another source of unhealthy constistutents.

The main point I'm still concerned of is the color, depending on what it used to color the filament it might be slightly poisonous. In my next batch there I will use natural PLA without coloring to eliminate this risk.

anode505 on Dec 18, 2012 said:

LOL  like the block out cat.  reminds me of a Trailer Park Boys episode; they blurred the cat's identity :)

MichaelAtOz on Dec 18, 2012 said:

Secret Operative Ninja Cat ;)

JohK on Dec 18, 2012 said:

I do value customer privacy!