Difficulty swallowing, also known as dysphagia, results from several common medical conditions, including stroke, brain injury and Parkinson's disease. In order to limit complications due to dysphagia such as aspiration, pneumonia and chronic lung disease, professionals may attempt to limit bolus volumes. Individuals vary widely in regards to the sip size they voluntarily consume, perhaps due to motor control and oral sensitivity. Prior research, however, does not control for participant awareness of the study purpose. Recently Clark et. Al, (2014) concluded that sip sizes vary based on straw diameter. In this study participants were aware of the purpose of the research, but it is unknown whether this knowledge impacts bolus size. This study seeks to quantify the volume of a discrete volitional sip of water through a straw when participants are unaware of the study purpose in the first trial, but made aware prior to a second identical trial. The role that awareness plays is further investigated by comparing two conditions within the same group to determine if awareness impacts bolus volumes.