Identify the user and activity.
State whether the product is intended for gym, cycling, hiking, school, team merchandise or everyday use. That context helps define capacity, grip, carry features and one-hand operation.
Document material and component choices.
List the bottle body material, lid material, straw or spout style, seal components and any carry loop. Avoid saying “BPA free” or making other material claims without knowing what product-specific documentation is required for the target market.
Test the real interactions.
- Opening and closing with wet hands
- Leak resistance in the intended orientation
- Cleaning access for lid and spout components
- Durability of printing or decoration
- Fit and function of any handle or loop