A container may include a tubular sidewall defining interior and exterior surfaces of the container, and including first and second regions disposed relative to one another along a major axis of the tubular sidewall. An identification mark may be embedded within the tubular sidewall at sectors about the tubular sidewall within the first region. Each sector may have a width, and the identification mark is machine readable by a reader viewing any arbitrary one or more of the sectors. Also provided herein is generally tubular container, preferably including a plurality of reservoirs defined therein. The container can be adapted for acoustic ejection of a fluid disposed within at least one of the reservoirs of the plurality of reservoirs. Alternatively, the container can be adapted for extraction of a fluid disposed within at least one of the reservoirs of the plurality of reservoirs using a non-acoustic liquid handling method.