I don't even ask my mom to go to the fridge for a brew.
Duty-Free Limits for Visitors Returning to U.S.
U.S. residents returning to the United States after 48 hours can take back $400 US worth of merchandise duty free every 30 days. This may include one litre (33.8 fl.oz.) of alcohol (provided the resident is 21 years or over), 200 cigarettes or 100 cigars that are not of Cuban origin. After a visit of less than 48 hours, or if the $400 allowance or part of it has been used within the previous 30 days, an exemption of $200 U.S. is allowed, including 150 ml (5 fl.oz.) of alcohol, 150 ml (5 fl.oz.) of perfume and no more than 50 cigarettes or 10 cigars, not of Cuban origin.