Wacaco made the world's smallest espresso machine, and it's the size of a coffee-cup - Yanko Design
WACACO Picopresso Portable Espresso Maker Bundled with Protective Case, Specialty Coffee Machine, 18 Bar Pressure Travel Coffee|Coffee Pots| - AliExpress
Amazon.com: WACACO Minipresso GR, Portable Espresso Machine, Compatible Ground Coffee, Hand Coffee Maker, Travel Gadgets, Manually Operated, Perfect for Camping, Hiking: Home & Kitchen
Wacaco Nanopresso Portable Espresso Machine, Upgrade Version Of Minipresso, 18 Bar Pressure, Extra Small Travel Coffee Maker. - Coffee Pots - AliExpress