Okay, this is probably just me being overcautious, but better safe than sorry, right?

I know how to appropriately store toys of different materials so that they don't react and ruin each other. But I'm curious as to whether or not anyone's ever had adverse reactions from toys staying in contact for just an hour or two. Like for example, a TPR silicone cock-ring (like the one you can get free with any order) used on a silicone dildo to make it vibrate. I somehow doubt that such brief contact will cause damage, but does anyone else have some input, about this or other short-term material combos?