Replying to Condom Cases

Most of my days I've been carrying around a "Jimmy" or in plural in my backpack, but now I've reached that age when a backpack is beginning to be a faux pas compared to the rest of my clothing. So, condom cases or containers - any good suggestions? I'm looking for something pretty basic, that can fit more than one, but still enough for a night's outing if the need arises.

Mind you, most condoms around here do not come in the universal "square" shape as in many movies and condom dispensers in a the Men's room... they are more rectangular, such as this.

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I'm just looking for something safe other than a wallet and I know someone here should be able to give me some options. Most cases I've seen sold are not wide/tight enough for these kind of rubbers, so I'm at a loss.