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Some materials do, especially if they touch certain other materials. Even some silicone toys can melt, at least that's what I read a few times online.
Some silicone toys + some silicone lubes don't mix (the silicone in the lube attaches itself to the silicone in the toy making a gunky mess), but silicone toys do not interact with other silicone toys if they're 100% silicone and made properly. All of my toys are safe materials (glass, fabric, hard plastic, silicone, metal), and I toss them in a box together. Have been doing it for years with no problems.
Tantus also stores their toys unprotected in bins - again, no problems.