Drinkware acessories and drinkware assemblies incorporating the same are disclosed herein. The 4-bit operation field 52 can only include an operation code cc that indicates a branch operation which uses a stored value of the implicitly indicated constant register 36 as the branch address, or a constant const. The anti-tilt swivel mechanism comprises a tilt stop mounted on the swivel mechanism to move with the chair and engage the base plate along a front edge. The suspension system uses a flexible connection to suspend the optical module over an opening in the bottom of the case.