Popping boba are edible chewy balls with a thin shell filled with juice or syrup (in this case, mango or cherry-flavored juice). They initially found popularity at boba (tapioca balls) tea shops but have occasionally appeared on the menu at certain quick-serve or fast food chains in more recent years.
Del Taco's Sprite Poppers carry a suggested price of $1.29 (may vary) for a 16-oz regular-sized cup and can be found at participating locations chain-wide.
Photo via Del Taco.