Sorry to bump this, but I have to agree with Psybin. Gravy separators should NEVER be used unless you're just trying to separate the bulk of the basic solution out and then use another method to decant the NPS.
Glass turkey basters, glass syringes, or a separatory funnel (in that order) are your best options.
Don't risk contaminating your product with the basic soup. A glass turkey baster is $6 on amazon.