Alessi & Petry [1] examined if cellular phone technology could be used to provide contingency management (CM)-based reinforcement for alcohol abstinence by comparing two randomized conditions: (1) CM for submitting videorecorded alcohol breath tests (BrAC) via cellular phones regardless of the results and (2) the same condition plus escalating vouchers for negative alcohol breaths (n-BrAC). They found that the percentage of n-BrAC and the longest duration of consecutive n-BrAC were greater in the group that received CM for alcohol abstinence. The strength of this study is the innovative use of the popular and widely used cellular phone technology, which is costeffective and which enables the monitoring of drinking in a real-world setting while providing immediate reinforcement for alcohol abstinence. This innovative use of the cellular phone may facilitate the adoption of CM intervention in diverse clinical settings.CM is considered an effective treatment strategy for promoting abstinence from licit and illicit substance use [2,3]; however, the application of this intervention is impeded by several factors, thus raising the question of whether the intervention can be applied in the real world. A particular challenge in using CM to reduce alcohol use is the limited technology available to test for alcohol use. Current breath alcohol readings can only determine alcohol consumption 4-12 hours prior to testing [4], so they must be taken several times a day to detect use, thereby making the application of CM for alcohol abstinence in the out-patient setting almost impossible. This is concerning, given that alcohol is the most common substance for which patients seek substance abuse treatment [5].Clearly, an accessible, feasible and effective way to deliver CM to reinforce abstinence from alcohol is needed, and the use of cellular phone technology may be one way to accomplish this goal. Alessi & Petry [1] have developed a novel way of using portable technology such as cellular phones to test blood alcohol concentration. Importantly, this technique was used to monitor drinking at relevant contexts and times. Probes for alcohol tests were clustered during the weekends and weeknights, where drinking is most likely to occur. Such modification may make the use of technology to deliver CM more practical.CM has also been criticized for financial and administrative burdens. The CM participants in Alessi & Petry's [1] study earned, on average, $219 (Ϯ$106) in vouchers, which is comparable to the amount earned in previous CM trials for alcohol abstinence [6] and lower than the previous voucher CM system of approximately $1000 [7]. Using cellular phones to deliver CM may help to even further lower other related costs that are often not reported in published studies, such as the cost of space and personnel time needed to administer the daily CM procedures for the duration of 8-12 weeks. It is also less demanding on participants, because it reduces frequent travel required to the research facility to verify abstinence and receive ...