Go-Cups vs Slim-Cups

  • Go-Cups

    • 8 oz Milk Capacity.
    • 4 Parts.
    • 4 x 4.7 x 3 inch.
    • Compatible with 13, 15, 17, 19, 21 mm silicone insert.
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  • Slim-Cups

    • 5 oz Milk Capacity.
    • 3 Parts.
    • 4.5 x 4.75 x 2.5 inch.
    • Compatible with 15, 17, 19, 21 mm hard flange.
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Are These Compatible with My Breast Pump?