Camp Urinal Prototype Design

I'm looking for a prototype design file for a portable camp urinal. The design should be made primarily from plastic, with specific features to enhance usability and convenience for camping enthusiasts.

Key Design Features:
- **Leak-proof Design**: This is crucial to ensure the product is reliable and mess-free.
- **Easy to Clean**: The design should facilitate hassle-free cleaning, appealing to all campers.
- **Compact and Lightweight**: This portable urinal needs to be easy to carry, appealing to the weight-conscious camper.
- **Interchangeable Funnel for Unisex Use**: The prototype should include a funnel that can be used by both males and females.
- **Funnel on Hose to Main Storage Bottle**: The funnel needs to be connected to a hose leading to a main storage bottle, which should be a minimum of 1 litre in size.
- **Shutoff Valve**: The funnel should have a shutoff valve to the hose to prevent any leakage.
- **Cap for Funnel**: There should be a cap included for the funnel.

Ideal Skills and Experience:
- Proficiency in product design, particularly for camping or outdoor gear.
- Experience with designing leak-proof, easy-to-clean, compact and lightweight products.
- Understanding of creating unisex designs.
- Skills in CAD software or similar for prototype design.

I am open to suggestions, but I aim for a design that is practical, efficient, and user-friendly. Please provide relevant past work and examples in your proposal.