Custom water bottles are bottles that have been designed and personalized with a specific design, logo, or message. They are often used as promotional items or as a way to showcase a brand or organization. They can be made from a variety of materials, including plastic, stainless steel, and glass, and come in a range of sizes to suit different needs. Custom water bottles can be purchased from a variety of retailers and are often used for events, sports teams, corporate branding, and personal use.