Sangria is almost always a delicious wine based beverage. Member’s Mark (Sam’s Club) Sangria is no exception. It is sweet and fruity, yet balanced with red wine and spices. It is highly affordable and almost always in stock. Sangria can be enjoyed at room temperature or chilled, but with higher temperatures everywhere, you really do want to enjoy it chilled. Normally, you would expect such a sweet beverage to be quite unhealthy, but Sangria, at least this one in particular, is an excellent source of potassium, an essential nutrient that many Americans don’t get enough of.