DISPATCHES FROM THE WINE CAVE LEFT: Warren’s souvenir bottle pops up in Buttigieg wine cave debate.

On a Saturday evening in June 2018, with temperatures in the 70s and the Red Sox playing at Fenway Park, supporters of Massachusetts Sen. Elizabeth Warren gathered at the City Winery Boston for a fundraiser.

They were treated to songs by the Grammy-winning artist Melissa Etheridge and heard remarks from Warren, who was months away from announcing her campaign for the 2020 Democratic presidential nomination. For the top donors, those who could contribute or raise $5,400 per couple or $2,700 a person, there was a VIP photo reception and premium seating.

For them and others who gave at least $1,000, there was also a gift: a souvenir wine bottle.

In Thursday night’s Democratic presidential debate in Los Angeles, Warren lit into rival Pete Buttigieg, the mayor of South Bend, Indiana, for attending a fundraiser at a “wine cave” in California’s Napa Valley where he dined and sipped under a chandelier with Swarovski crystals and where the most expensive wine costs about $350 a bottle — and about $900 for an extra-large version.

Related: Nancy Pelosi’s vineyard makes her fourth-richest Californian in Congress.