Thanks, we had thought about that. In fact, around 2015, all our devices came standard with those little rubber grommets. But we found that most people found them a hassle more than anything. Kept losing them or breaking them, and in the end abandoning them.something my covers do that is useful to a twisp user is cover the charge port so juice can't get in. You can get little rubber things for charge ports to seal them from alot of cell corner shops, might be useful to you guys if you hadn't thought of it