Explain the functionality of custom sipper bottles for hydration on the go. Offer suggestions for personalizing bottles for specific audiences:
- Fitness Fans: Add motivational quotes or millilitre markers to track water intake.
- Corporate Gifts: Engrave company logos alongside sleek, professional designs.
- Outdoor Enthusiasts: Include weather-resistant materials and features like carabiner clips.
Provide advice on designing bottles that are durable and visually appealing.