For a long time, I never carried my dice in a bag. I would either keep my dice in the same container I bought them in if I bought a set, or throw loose ones in a jar that my brother and I kept. For a short period of time, I kept a set of the usual standards in a small BreathSavers tin. But eventually, my collection grew to this.
And I needed something that could carry all that. My previous dice bag was large enough, maybe too large. It was made of a thin material and was a hassle to carry around. My new bag is just the right size for all the dice I need to carry, is made of sturdier material, and sits upright when open. It's a definite improvement over the rattling black bag I had before.