This orange squeezer fits onto any 40 mm diameter bottle cap. Simply cut a hole in the top of the cap and glue it to the underside of the squeezer and you have a screw on juicer! I glued the cap of a 2l Oros bottle onto mine, but you can get small bottles with the same caps. It all depends on how much juice you want! PS. Printed in ABS, treated with a acetone atmosphere for around 2hrs and rubbed down with acetone to seal the surface. Then put in a hot box oven at 60-70 degC to remove any acetone from the part. And then hand washed with dish soap before use. Superglue worked best to fix the cap to the part.