Image of a kid's water bottle is shown below. Visualise a lunch box to pair with it. It should be matching in design language with relevant details. Sketch and render the bottle and the lunch box with required graphics.
Evaluation Criteria:
Originality in the form of the lunch box, and its proportion
Visual consistency with the form of the water bottle.
Relevant details for the lunch box.
Surface shading
Quality of line/strokes
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To ensure design consistency, create a "mood board" of keywords from the original object. For this bottle, words might include: "rounded," "tapered," "soft," "cylindrical," "loop," "pink." Then, make sure your new design incorporates all these keywords in its form and features.
Step 1: Measure the bottle's key proportions.
Note the ratio between the bottle's tapering body height and its bulbous lid height, and its overall width to height ratio.
Step 2: Rescale for a lunch box's function.
Apply a similar body-to-lid ratio but flatten and widen the overall form, since a lunch box needs to be shorter and wider than a bottle to hold food.
Step 3: Carry over the graphic motif at matching scale.
Place the same circle-and-ring pattern from the bottle onto the lunch box's surface, keeping the pattern's size relative to the box similar to its size relative to the bottle.
Step 4: Match the functional details and render.
Design the latch and handle to visually echo the bottle's push-button lid and carry loop, then render both items together with matching shading for shiny and matte surfaces.
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Approach Solution -2
A different strategy is to design the lunch box's function first, working out how a child would actually open, carry, and clean it, and only then apply the bottle's visual language on top of that functional shape.
Start by deciding the basic mechanics a child's lunch box needs: an easy one-hand latch, a secure but light lid, a handle sized for small hands, and possibly an internal divider, without yet thinking about how it should look.
Block out a simple, practical form that satisfies these needs, for example a wide oval body with a hinged or clip-on lid, sized so a child can lift and carry it without strain.
Only once this functional skeleton is set, go back to the water bottle's design language and apply it on top: soften the oval's corners to match the bottle's rounded aesthetic, reshape the lid into the same bulbous forms seen on the bottle's cap, and style the latch to visually echo the bottle's push-button lid mechanism.
Apply the bottle's circle-and-ring graphic pattern onto the now-styled surface last, treating it as a finishing layer rather than a starting point.
Render both items together, checking that the final lunch box still works practically as a lunch box first, and reads as a styled match to the bottle second.
Starting from function and layering the bottle's look on afterward helps avoid a lunch box that looks right but would be awkward for a child to actually use.
