I've noticed today on a feed I follow (ig: @bobafordays) of a bubble tea shop in Westminster, California: Beepop Cafe (ig: @beepopcafe). What struck me was the bubble tea served in a clear plastic bag (motto: "bagged drinks are better"). The bag is similar to the collapsible drinking bottles by Platypus and stands upright on its own. It also has a ziploc closure. Unlike a bubble tea served with a typical cellophane top that commits you to finish as soon as you puncture it, the little baggie can be re-sealed. The bubble tea bag also has a finger-hole for simplicity of carrying.