The only test of whether your packaging design works in store is sales. It's not what the design agency tells you. It's not what you think as the founder; you're probably too close to your product to judge how it comes across to outsiders to your brand.
Stage One: Does it catch the consumer's eye?
Look at the amount of choice she has here.
I've been in the aisles a lot recently interviewing consumers about packaging - what catches their eyes, what suggests natural and what doesn't, what's new, what's old. Women notice the nuances of packaging: the shape of the bottle, the shine of the cardboard on the cardboard sleeve, the colours, the font, all the pack messaging .... nothing misses their beady gaze.
So, how can you do it well? Here's a new example to learn from.
I nipped out of the office on Friday. To Shoreditch. To the innocent 5-a-day for £5 lunch. (There's me on the right in the purple cardi Crackberrying away, waiting for my lunch guest.)
The food was excellent. Beetroot and horseradish perogi with sour cream, paprika and pickled red cabbage, and sweet potato brik with roasted pepper, courgette and chickpea salad. Innocent gave us the recipes on arty cards to take home.
Next, we waddled past the lettuce wall.