A Georgia middle school teaching assistant was arrested and canned after a student drank her bottle of vodka thinking it was Mountain Dew — with her blood-alcohol level sitting at three-times the legal limit, police said.

Alexandra “Nicole” Lambert, 39, was fired from the Morgan County Middle School after a student took a sip out of a bottle that allegedly belonged to her, believing it was just soda, WSBTV reports.

Instead, the student threw out the drink and alerted another teacher, who brought the matter to the principal’s office on Thursday afternoon.

Lambert allegedly admitted that the bottle was full of vodka, but claimed she brought it to school accidentally.

Morgan County Sheriff’s deputies were called in at around 1:15 p.m. and gave Lambert a breathalyzer test, which registered her blood-alcohol level at 0.259.

The reading was more than three-times Georgia’s legal limit for driving at 0.08.

Lambert was arrested and charged with a citation for disorderly conduct, which involved public drunkenness.

She was booked at the Morgan County Sheriff’s Office Adult Detention Facility.

Morgan County Charter Schools confirmed the incident in a statement to parents and guardians, adding that Lambert “is no longer employed with our district.”

“The safety of our staff and students is paramount, and we take all incidents seriously,” the district added. “We have zero tolerance for any behavior that could jeopardize their well-being.”

An attorney for Lambert could not be immediately reached for comment.