You can have a read of
this which explains in brief about the chemicals leaking into water from bottles. It doenst really specifically say SS (and I couldnt find any information on that when I checked up yesterday).
Thanks Bearlove, that was enough to point me in the direction to find the link, although I found no research directly relating it to SS, there appears to be some meat on this bone, just not very much...
Bisphenol A (BPA), a chemical in some plastic bottles, is linked to P450 inhibition [1], something that can create a fatal condition with MDMA (eg Ritonavir.) But the concentrations of BPA needed are huge... Your pushing 6-7ug BPA to start to push yourself out of the normal genetic functioning range of the P450 enzymes. You can estimate that you will get 10 ug per litter from a plastic bottle [2] so with a average person weighing 60 kg, they would have concentrations of ~1.33 ug after drinking 8 litters of water from BPA containing plastics. Attached chart shows P450 activity vs concentration of BPA in rats [1].
In my quick review of the data, water intoxication syndrome would be far more of a risk then BPA induced injury when consumed with MDMA. If you have a comprised P450 complex this could bring additional risks, but you shouldn't be taking MDMA in that case anyway. YMMV...
If one is very concerned about this you can avoid plastic bottles with a 7/OTHER recycle category.
[1] Nobumitsu Hanioka, Hideto Jinno, Toshiko Tanaka-Kagawa, Tetsuji Nishimura, Masanori Ando, Interaction of bisphenol A with rat hepatic cytochrome P450 enzymes, Chemosphere, Volume 41, Issue 7, October 2000, Pages 973-978, ISSN 0045-6535, DOI: 10.1016/S0045-6535(99)00529-9.
[2] United States. U.S. Department of Health and Human Services. National Toxicology Program. NTP-CERHR Monograph on the Potential Human Reproductive and Developmental Effects of Bisphenol A.