How do you play Cup Flow?

Tap a cup to select it, then tap another cup to pour water from the selected cup into it. If a level has a faucet and drain, use the Fill button to top up the selected cup or the Empty button to drain it. The goal is to reach the exact target amount shown by the glowing dashed line on the target cup.

What is the water jug puzzle?

Cup Flow is based on the classic Die Hard water-jug problem. You have cups of fixed capacities and must measure an exact volume using only pouring, filling and emptying. It is pure volume arithmetic with no physics or colors.

How many levels does Cup Flow have?

The game has 30 hand-tuned, solver-verified levels across five tiers. Early tiers use only pouring between cups, while higher tiers add a faucet and drain and eventually require hitting two targets at once. Earn up to three stars per level by matching the optimal move count.

What are the stars based on?

Stars reward move efficiency against the optimal solution. Solve the level within the optimal number of moves for three stars, within 1.4 times optimal for two stars, and any successful solve earns one star. Each level shows its Par (optimal) move count.

Is Cup Flow free to play?

Yes, Cup Flow is completely free to play online in your browser. No download or signup is required and it works on desktop, tablet and mobile devices.

Play Cup Flow Online Free - Pour and Measure Puzzle

CUP FLOW

Pour to Measure

GameZipper.com

Select Level

Level Complete!

Target reached

Moves: 0 Par: 0

How to Play

1

Select — Tap a cup to select it. A glowing ring shows the active cup.

2

Pour — Tap a second cup to pour water into it until it is full or the source is empty.

3

Fill / Empty — On faucet levels, use Fill to top a cup to its brim or Empty to drain it.

4

Target — Reach the exact amount marked by the glowing dashed line. Match Par for 3 stars.

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Cup Flow — Free Online Pour and Measure Water-Jug Puzzle Game | GameZipper