This one is a bit late as the promo started beginning of the year. Basically you sign up for Utopia membership card ($20) and get 50% discount on your bubble tea purchases. Also includes discount to meals and karaoke.
The link shows an old promo - I have only seen this deal advertised in stores.
Conditions apply:
Limit of 5 drinks on purchase.
Purchase valid once every 10 days each month
If you're a regular Bubble tea drinker, you pretty much get return on investment after buying 8 drinks.
How does limit to 3 times per month meet the definition of regular?