I just keep mine on the card thing you buy them on, when I take them out of my hair I put them right back onto that thing.
I also have a few on the top of my dresser lol.
And some clipped onto the pockets inside my purse.
I rarely lose mine, strange!
Even if Im out and about and I take them off my hair, if I dont clip them in my purse to put away later, I clip them on my jeans pockets or the bottom of my shirt, and then put them away when I get home lol.