Description:

This is a transfer cap designed to connect a standard EU-format PETG bottle to a 5L container — perfect for soap, crop sprayer fluid, windshield washer fluid, or burnt motor oil.

Simply cut a PETG bottle at both ends and use it as a built-in funnel attached directly to the container. Both sides of the cap feature an internal collar that guides liquid flow to the center, minimizing drips and spills during pouring.

Useful for:

• Transferring burnt motor oil into 5L containers using the cut bottle as a funnel
• Refilling windshield washer fluid or liquid soap containers
• Decanting agricultural sprays or detergents
• Any messy liquid transfer where spills are a problem

Printing recommendation: To ensure maximum durability and a tight seal, I recommend printing this part in PETG filament with 100% infill. This provides better strength and chemical resistance, especially when used with aggressive liquids. Supports are required.