[timonoko]

No coating needed. All you need is to re-flow the ABS. Feels like pottery after this simple operation: https://youtu.be/iLaGJwCCz-E?si=a1gccp8EI9sGzt-e

[echoangle]

Do you really want almost-boiling-water in ABS? I wouldn't do that.

[timonoko]

Reflow happens at 200°C, out gassing any 3D-related harmful stuff.

Equal to inject-molded ABS cutlery.

[echoangle]

Maybe I'm too careful but I wouldn't use plastic cutlery on hot food either. Also, the glass transition temperature of ABS is only 105 °C, so It's probably not too strong when filled with 100 °C water.

[timonoko]

I have already made all kinds of tests. Only restriction was that you cannot make open flame cooking pot, because it starts combusting too easily.

[echoangle]

How did you test the water quality after storing it in an ABS container? How would you notice if something from the ABS dissolved in the water?