Bubble tea safety depends on the tea base. Black tea versions contain caffeine (40-70mg per serving). The tapioca pearls are safe but high in calories and sugar. Some shops use unpasteurized milk — ask about ingredients.
A "Use Caution" rating means this food is generally fine during pregnancy but comes with a specific factor worth managing — a daily limit, a preparation requirement, or a moderation guideline — rather than a reason to avoid it outright. These ratings reflect general guidance from the FDA, ACOG, CDC, and USDA. The goal of the "caution" label is to flag what to pay attention to, not to suggest the food is unsafe when that factor is properly managed.