[WARNING!] My good friend's boyfriend is a professor in sleep research at a university in California. When I was visiting them a few weeks ago, I asked if he used dmso in the lab and if so, how did he store it? He told me that they use dmso in many, many experiments and that they always store it in glass bottles. When I told him that I had recently put some of my dmso in a small, cosmetic plastic spray bottle to use with grapefruit seed extract for nail fungus, he looked concerned and suggested that I only store dmso in glass.
Ah, good thing I had that discussion. When I got home from the trip, I smelled the little plastic spray bottle that I had been using the previous 2 weeks. It reaked of chemicals! Yikes!! I compared the smell to the dmso in the thick white plastic bottle that I bought from an online vet supply store, which looks just like the one in Ted's photo. Thankfully the big bottle had a typical dmso odor - a faint scent of garlic. Needless to say, I immediately threw out my spray bottle. Until I find a glass beaker or bottle from a science supply store, I am using a glass dropper for the dmso.
Be warned, be warned!