Agate is ideal for preparing most IR solid samples because it is inert and easy to clean. The agate vial for the Wig-L-Bug™ consists of a 2 part white Delrin® outer shell and a 3 part inner liner assembly comprised of an agate vial, an agate cap and a 6mm agate ball pestle. The inner agate vial assembly fits snugly into the Delrin® outer shell, and the entire assembly fits both the regular Wig-L-Bug with metal spoon arms and the digital Wig-L-Bug with plastic spoon arms. The need for a supplemental adapter to hold the vial in place that was required for prior versions of this vial has been eliminated---the assembly simply snaps into the space between the spoon arms of either Wig-L-Bug™.