What did you observe?

What did you observe and note as you watched users interact with your prototypes?

Other friends would zoom in on my sketches and ask questions about the structure, and I would make notes on areas that needed further structural refinement.

What feedback did your users share after the testing?

What feedback did your users share after they've had a chance to interact with and explore your prototypes?

Brand name, how will you label it? (Will this container be refillable for all the different branded products that each individual uses?)
If the plastic is biodegradable, how will you preserve the cosmetics without a chemical reaction?
Why not just sell the soft part instead of the hard bottle?

o Vinyl type:

TPE (thermoplastic elastomer): A flexible yet durable material that combines the benefits of elastomers and plastics.
LDPE (low-density polyethylene): Highly resistant to oxidation or degradation and protects contents
PET (polyethylene terephthalate): Resists degradation, provides transparency and durability
PP (polypropylene): Excellent heat and corrosion resistance, prevents deterioration and oxidation
EVOH (Ethylene Vinyl Alcohol Copolymer): High oxygen barrier to protect contents and extend shelf life

o Environmentally friendly type of vinyl:

LDPE (low density polyethylene): Recyclable, low energy consumption and carbon dioxide emissions in production
Biodegradable vinyl: A material that can be naturally degraded under certain conditions.