Suppliers on Made-in-China.com usually offer extensive OEM/ODM services. This includes custom Pantone colors, silk-screen printing, heat transfer printing for complex logos, and laser engraving. You can also request functional modifications such as adding time markers for hydration tracking, removable fruit infusers, or integrated straws. Ensure you confirm the MOQ (Minimum Order Quantity) for custom molds, which typically starts at 3,000 units, whereas simple logo printing may only require 500 units.