Where to keep pepper spray so it doesn't accidentally go off?

I just got some Sabre pepper spray. The way it works is you move the safety switch to the right, then press it down to spray. It is not hard to move. I’m worried about keeping this in my purse for fear of it accidentally going off. I suspect the same thing will happen if I keep it on my keychain. My keychain usually ends up in my purse anyway. I read somewhere online not to keep it in the car during summer as it can leak. Is there anywhere that’s really safe to keep pepper spray when I’m away from home?