I don"t think it would be good idea using this type of case for our Raspberry PI"s with the case being made of polypropylene
The problem is with the two parts of the case rubbing against each other when opened and closed the box will generate a lot of static, wouldn"t want to subject my PI to static. I think I would rather use a potting box instead which are cheap as chips
like this http://goo.gl/99Ohx
Meh, don't worry too much about ESD. The Pi will be fine inside that box. And besides, other plastic surfaces also build up a substantial charge when two surfaces are separated from each other.