Reusing tissue containers

I have a question for all of you. I keep seeing tissue containers/boxes in the good wills. There must be some way to recycle them. I thought of planters. But they are usually narrower on the bottom (where the hole is for the tissue), but if turned upside down it could be used as a plant container (then the slid where the tissue would come out) will serve as the bottom of it. I guess placing some kind of net so that the dirt doesn't come out, just the excess water.
But I'd like more ideas! More heads are better than one.
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