Is the material you're using certified for food use? You will get water condensation on the inside while the cell is running while heating. IF enough it will drip back into your cell water. If its not food use certified, it could pick up stuff you really don't want in the Colloidal Silver.
Dear Gene, according to FDA Regulations CFR 21, I found this.
"Sec. 177.1500 Nylon resins.
The nylon resins listed in paragraph (a) of this section may be safely used to produce articles intended for use in processing, handling, and packaging food, subject to the provisions of this section:
...
(9) Nylon 12 resins are manufactured by the condensation of omega- laurolactam."
While most SLS powders are graded food safe, the particles on the surface of printed parts might not fuse completely, resulting in parts that are inherently porous and do not deal well with moisture and mold growth.
Nylon 12 offers a good strength, durability, chemical resistance and good heat deflection temperatures (HDT of 177°C)
So, for just $12.88 I paid for shipping (promo credit didn't covered that) I believe you can't go wrong.
There is another printing methods like FDM with ULTEM 1010 material, that will be food certified but it is very expensive, about $162.21.