You start with a 2-liter bottle of 7-Up

Princess Alice

You can increase the number of liters of soda, but for each additional liter, you have to take away a 1-Up.

So you can have a 3-liter bottle of 6-Up, or a 4-liter bottle of 5-Up, etc., as long as the total is 9.

What combination do you choose?

Tatterhood

an 8-litre bottle of 1-up seems like it would come in handy

Tatterhood

alternatively, a 4.5-litre bottle of 4.5-up maximizes the total amount of up

Princess Alice

Wait, are you allowed to have fractional Ups?

Imipolex G

I do that Super Mario trick where you stomp the koopa on the stairway to get 99 1-Ups

Tatterhood

Central Avenue said:

Wait, are you allowed to have fractional Ups?

I don't know, do you want to make everyone solve integer quadratic programming problems all day

MetaFour

With 8 liters of 1-Up, just imagine how many recipes from this book I could make!

Lunate

If you keep going after 8 1-Ups, do you get 9 0-Ups? If you keep going, do you get 10 -1-Ups? Is it equivalent to 10 1-Downs?

Tatterhood

at least, we can finally learn how 7-down tastes

hopefully good since we'll have 16 litres of it

Princess Alice

Just watch out, because if you're not careful you might end up with dnL

Anonus

At least you wouldn't end up with KDNL

eriophora zia

Somehow I ended up with 5 2.3-Sideways 

send help

Calica

shit now i have sixteen liters of dnL

lee4hmz

MAKE 7
UP YOURS

Fossilmaiden

I broke something and ended up with a can of Zup. What do I do?

glennmagusharvey

I tried to break it that same way but I instead ended up with seven hurricanes crossed with seven dog-girls.

Bee

Tatterhood said:

alternatively, a 4.5-litre bottle of 4.5-up maximizes the total amount of up

mad ups

eriophora zia

Fossilmaiden said:

I broke something and ended up with a can of Zup. What do I do?

Be glad it isn't Sprite. 

Sredni Vashtar

Add some Wud and chase it with some Madood.