Safe bath houses

Hi, I'm searching for a safe, durable bath house that can prevent most of the dust from flying out. I'm currently using a cardboard box but it's difficult for the chinchillas to have full contact with the dust on the flat surface. The Kaytee Chinchilla Bath House seems to be a popular choice, but I usually avoid Kaytee products (since most of the time they aren't safe.) Is this dust bath safe and if not what do you recommend?
Any response is helpful,
Thanks.