Presenting "Opioid" case. The dimensions of regular US drug bottle are perfect for Zero, Zero W. All you need is to make hole(s) for your cable(s)
You can get this bottle from your next door drug dealer. This computer will be perfect to spread fake news and destroy American democracy. Don't forget, that President elections are coming soon. If CIA visits you, just drop your Raspberry to your cocaine. This won't look suspicious.