Glass or ceramic is best. Avoid metals which can rust and contaminate the water. Water should be replaced once or twice a week. For some species which like higher humidity, spraying a mist of water daily is helpful. Keep in mind that many spiders and nearly all scorpions require little water.
Some scorpions can live their whole live relying only on the moisture in the food.
Handling Spiders should be handled as little as possible to assure the safety of the spider and the owner. A spider that is dropped can be harmed in the fall. If it is not harmed it can scurry away and be lost. A spider that escapes in the outdoors or even indoors may be very difficult to relocate. Never handle or disturb a spider during or immediately after a molt.