Crafted Chest

You create a solid chest made of materials found around the touched location. This chest can be made to encompass up to 5 cubic feet of non living material. The chest is sealed after an object is placed within it. It can be programmed with an intended recipient, a code phrase, key item, or timer. The DC to enter this chest other than the programmed means is equal to the caster's spell casting DC, regardless of how they try to open it. A caster can create up to two of these chest at a time. 

The caster can create larger chest at higher levels. 10 cubic feet at 5th, 15 cubic feet at 11th, and 20 cubic feet at 17th