Rarity examined the beverage with a critical eye.
"Is this non-dairy? I suppose it wouldn't be if it's like a malt. Nothing against cattle, of course, but I do have my preferences. Although it is quite a peculiar colour…"
She was just about to take a sip when Sweetie Belle entered the frame.
"Oh, Sweetie!" Rarity called out, before her sister could escape. "Have you heard of this, ehm, 'grimace shake'? I hear they're all the rage around Equestria right now."
Sweetie Belle cringed - or grimaced. "That was popular days ago, sis."
"Come now, sister," Rarity chided, "just have a sip with me."
Sweetie Belle pumped her hooves down on Rarity's barrel. "Stay with me!" she pleaded. "Rarity!" But Rarity laid still, catatonic, her eyes rolled into the back of her head. When Sweetie Belle tried to give her air, she sputtered. A purple foam spilled from the mare's mouth.