Slush Sisters Book

Austin, Texas

Two sisters, one frozen drink machine, and a lot of Austin to cover.

We are Harper and Finley. We are 11 and 8, we live out by Lake Travis, and we run a real company that rents out a frozen drink machine for parties. We bring it, we set it up, we come back the next morning and take it away. You just have the party.

Check your date
Finley and Harper holding cups of bright red frozen strawberry slush
AUSTIN · TWO FLAVORS · CANDY GARNISH ON EVERY CUP · FROZEN OR COLD · $250 ALL IN · AUSTIN · TWO FLAVORS · CANDY GARNISH ON EVERY CUP · FROZEN OR COLD · $250 ALL IN ·

Where we go

We are based near Lake Travis, so the closer you are to us the easier it is to say yes. Delivery is free inside our home area. If you are further into Austin we will still usually come — just ask us when you check your date, because it depends on what else is booked that day.

Not on the list?

Ask anyway. The honest answer is that it depends on the day and how far it is — a Saturday in June is harder than a Tuesday in October. We would rather tell you yes or no straight away than leave you guessing, so put your address in and we will come back to you.

It does cold drinks too, which nobody seems to know

Everyone thinks this machine only makes slush. It does not. The same machine will chill a drink and serve it cold instead of frozen — so it works in December as well as July.

Frozen

What most people book. Six flavors, thick and slushy, and a candy garnish on every single cup. This is the birthday party one.

Cold

Same machine, not frozen. Good for a holiday party, a work party, or anything in a month when nobody wants a slushie.

Two tanks

The machine has two sides, so you get two different drinks at once. A lot of families do one for the kids and one for the grown-ups.

One price, nothing added at the end

$250
for the whole party
  • The machine, both tanks, two flavors
  • Cups, straws and the candy garnish
  • We deliver it and set it up
  • We come back the next morning and take it away
  • No delivery fee in our home area

Further out in Austin? Ask us — we will tell you straight away whether we can make it work.

Grown-ups: the machine goes out with regular non-alcoholic mix in it, and it comes back the same way. What you put in it after we leave is up to you. There is a page for that.

If you found us because someone wrote about us

Hi. Yes, we are actually kids, and yes, it is actually our company.

Slush Sisters LLC is a registered Texas business. We do the flavors, the setup, the candy garnish and the customers. Our dad drives the van, and he keeps a list of everything he is supposed to do, which we grade him on. We are trying to build something real, and we are writing down how it goes as we do it — the parts that work and the parts that do not.

If you want to write about us, ask us something, or have us come to a school or an event, the same form works for that — just say what it is for. More about us here.

Get in touch

Questions people in Austin ask

How far will you actually come?

Free inside our home area — Lakeway, Bee Cave, Lake Travis and the neighborhoods right around them. Beyond that we will usually still come, but it depends on the day and what else we have on. Ask us and we will tell you honestly rather than making you guess.

Are you really two kids?

Yes. Harper is 11 and Finley is 8. We do the mixing, the flavors, the setup, the garnish and the messages. Our dad drives, because we cannot.

Can we put alcohol in it?

The machine leaves our house with regular non-alcoholic mix in it and that is all we ever put in. What grown-ups add after we have gone is their business, not ours. We do not buy it, we do not pour it, and we are not there for it.

How many drinks does it make?

Both tanks hold about 70 to 80 twelve-ounce cups when full, and you can mix more during the party and top it up. For most birthday parties one fill is plenty and there is some left over.

How far ahead should we book?

As early as you can, especially May through August, which is our busiest stretch. We have one machine, so once a Saturday is taken it is taken. Winter is much easier to get.

Do you do anything other than birthday parties?

Yes — pool parties, block parties, school events, teacher appreciation days, open houses and work parties. If you are not sure whether it fits, just ask.

Check if your date is open

Tell us when and where and we will come back to you. We have one machine, so the answer really is first come, first served.

Check your date