If you are referring to storing MMS (NaCLO2 solution) and 4% HCL in containers, I would suggest to only use glass, especially for MMS. MMS will degrade HDPE causing the container to crack and leak out the contents.
I have used the glass baby bottle plus that cap
to hold CDS, CDH, MMS1 and unactivated MMS for years and have not noticed any degradation of the cap, except a slight yellowing of the cap where it is exposed to any gases (CLO2) that can reach it from the contents. The product description does not say what material is used to make it, unfortunately.
Another bottle + cap you could consider using is GTS brand kombucha in a 16 fl oz glass bottle. The cap appears to use a teflon disc seal. Many grocery stores carry that brand. You will have to mark the bottle into 8 equal segments or other calibrations for your use. It would not have to be completely filled. I am using one of these at the moment to hold eight doses of unactivated MMS for daily use. Each dose from my bottle totals about 60 ml (2 fl oz) so I don't have to add any additional water to the dose.
Disclaimer:The protocols described on this site are official sacraments of the Genesis II Church of Health and Healing. The reader accepts 100% responsibility for any and all use made of any information herein.