Even as an accomplished versatile musician, I can not be expected to make music from just any old beverage bottle Naomi. Depending on how well the warm-up session went, I might be willing to provide some flexibility with respect to quality as long as potency has not been compromised. But it absolutely must be of sufficient capacity to be properly tuned with enough left over to wet my whistle and keep me in high spirits throughout the performance. We all know how temperamental cweus musicians can get about not having a proper instrument to play on.