Correction: In the world of portable espresso, "Lolita" is a nickname occasionally applied to the series due to its piston-activated mechanism, but more famously, "Lolita" is associated with high-end lever espresso machines (like the Olympia Cremina) which are not portable.
If this is a specific product from a niche brand (like a "Lolita Cheng" special edition), details are scarce. Below is a write-up based on the likely candidate: a piston-operated portable espresso maker with a 40mm basket or 40ml capacity, fitting the "Cheng" (possibly referring to Chengdu manufacturing or a specific seller) description. tba lolita cheng 40 portable