The standard hard shell gel cap that many of the products you buy at the pharmacy or health store come in.
Gelatin capsules contain only beef gelatin and purified water.
If Possible capsules should be stored in a cool (15 to 26 degrees C.), dry place (Humidity 45% and 60%), although they can tolerate a wider range of temperatures. If are allowed absorb to much moisture any capsules will expand and can be difficult to insert in capsule machines.