your fav lil coffee cart.

from local markets to private parties, we bring warm coffee and warmer vibes. woman-owned, queer-friendly, and made right here in the yarra valley.

made for your private events

perfect for birthdays, weddings, baby showers, and corporate functions. we bring unlimited coffee, friendly service, and a fun, relaxed vibe.
give your event that extra touch everyone will remember.

about us

hi, i'm sienna!

welcome to sie sie's. 
based in the beautiful yarra valley, serving up homemade and top-tier coffee at private events of all sizes, while continuing to pop up in some of the region’s favourite community spots.
rooted in local love and inclusive vibes, this lil cart is all about good coffee, good people, good spots, and a warm welcome; wherever we end up.

learn more

event hire

from backyard birthdays to big celebrations, we’ve got your coffee covered. packages start at $295 for unlimited service with a 4-hour minimum. no guest limits, just great coffee.

generator hire

no power? no problem. our 3300W generator makes us fully self-sufficient.
no electricity or water supply needed. perfect for off-grid plots, parks, and paddocks.

bonus cover

need extra hours or more guests? we’ve got you. quotes within 24 hours, and cancellations up to 72 hours in advance.
no stress, just sips.

flat pack design

our cart is completeley collapsible and designed to fit almost anywhere.
perfect for backyards, courtyards, and hidden event spots that other carts can’t reach.

lets get started!