The MixBox is very sturdy as a product but it isn't bulletproof. It's definitely not waterproof either, so no exposure to water, please!!
But with every electronic piece of equipment, please look after the MixBox and make sure it returns in the sturdy case we supply to you.
If you seem to have any difficulties with the MixBox you can go to the Troubleshooting page which will have more information for you.