I like the price point of the Ryobi drill bits for odd projects around the house, but found the default yellow/green case a bit too bulky for my taste. I settled on a bit sleeve that preserved the original black plastic holster to keep the bit sizes visible. Now, I can drop one or both of these in my tool bag without adding any real bulk. I hope you find this useful!
PS: I have the added benefit of reusing the case for some other small tools I've been looking to organize. Win-win!