Are there any good portable toothbrush cases?

I am currently undergoing orthodontic treatment, so I pay a lot of attention to my oral hygiene. I always carry a portable toothbrush and toothpaste in my bag. However, the plastic cases that come with portable oral care sets get dirty very quickly. Are there any cases that are pretty and hygienic? I've also tried carrying a toothbrush sterilizer, but it rattles and is surprisingly heavy. Please give me some recommendations.