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Mostly no—Twinings fruit & herbal infusions and Cold Infuse are caffeine-free; blends with green or black tea contain caffeine.

Yes, Twisted Tea has caffeine; a 12-oz can carries about 30 mg since it’s brewed from real tea leaves.

Yes—Twisted Teas can add weight if their alcohol-sugar calories push you past your needs; smaller cans, lighter flavors, and pacing reduce risk.

No; two tea bags raise caffeine a lot, but extraction levels off with time, water, and tea type, so the increase is usually under double.

No, you don’t need to use black tea; choose it for bold flavor and steady caffeine, but green, oolong, white, or herbal swaps often work just as well.

Most Uncle Lee’s flat paper tea bags appear heat-sealed, which often means a thin plastic binder in the filter paper; loose-leaf avoids it.

No, Starbucks’ Vanilla Bean Crème Frappuccino has no coffee by default; McCafé’s Vanilla Frappé is coffee-based unless you request otherwise.

Yes—vanilla chai lattes contain caffeine from black tea; a 12-oz cup often lands around 40–95 mg, depending on brand, brew strength, and add-ins.

Vanilla frappes without coffee contain 0 mg caffeine; coffee-based vanilla blends like a Grande Coffee Frappuccino carry about 95 mg.