Step 1:
The bottle paper is 2 times longer and wider than the cap paper.
Fold over these two lines.

Step 6:
Fold over the upper line and prefold over the other lines.
Use the prefolded squares pattern as guidance.

Step 5:
Repeat steps 2 to 4 in this direction. Then, unfold the whole model.

Step 2:
Prefold in half

Step 4:
Fold to the centerline and unfold the folds of step 2 to 4.

Step 3:
Fold the edges to the centerline.

Step 10:
Press the edges further against each other, see arrows. And fold the neck of the bottle downwards. Do the same on the other side.

Step 8:
Fold over these prefolded lines and glue/tape both ends together.

Step 9:
Fold/press the 2 pair of yellow lines against each other, do the same on the other side.

Step 7:
Turn the model.

Step 16:
Fold aluminium foil around a white paper.
Prefold in half, then prefold over the upper line.

Step 15:
Done....

Step 12:
Fold over these two lines and turn the model.

Step 11:
Fold the edge downwards over the prefolded line.

Step 14:
I taped transparent tape around the bottle, to make it look more glossy.

Step 13:
Fold this edge downwards too, use glue or tape.

Step 19:
Fold these three edges downwards, start with the left edge, see arrows.

Step 20:
Glue/tape both ends together, see upper arrow. And fold/press the top of the cap downwards/flat, see large arrow.

Step 18:
Prefold in half, then prefold over the two outer lines.

Step 17:
Fold the edge to the prefolded line.