Easy Assembly

RAPAMAR boxes are designed to make your life easier!  Our corrugated cardboard boxes and lids are quick and easy to assemble, as well as strong and reliable.

We provide assembly instruction sheets with every order and provide step by step illustrated instructions below.

We have also made instructional videos for each container type to help clarify the process.  Need help with assembly?  Feel free to call or contact us for assistance!

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Square & Rectangle Container Assembly

Our boxes will arrive at the destination of your choice folded flat.

Step 1

Expand the box and refold it so the open/cut corners of the top sides are opposite each other, then crease and fold down the top collar of the box.


Step 2

Open the carton fully, place upside down, and fold down the large #1 flap on the bottom.

Step 3

Fold down the #2 flap.

Step 4

Insert the #3 flap into the nearest cutout on the #2 flap.  (On the 3-gallon container, the #3 flap folds across the #2 flap.)

Step 5

Insert the #4 flap into the remaining cutout on the #2 flap.

Step 6

Turn right side up and check inside the box to be sure flaps #2 and #3 are lying flat and that #1 flap is forming a good seal on the bottom of the container.

View our Rectangular Gallon Box & Lid assembly video.

Square & Rectangle Lid Assembly

The lids will come shipped flat.  Gently crease all scores on the lid.

Step 1

Fold the short panels up, then fold the scored ends in to form the corners.


Step 2

Fold the long panels up and fold again to tuck the tabs on the end panels into the small notches in the top of the lid.


View our Rectangular Gallon Box & Lid assembly video.