Menstrual Cups

Oi Cup

Country of origin: New Zealand
Composition: TPE
Sizes:  Small, Medium, Large
Dimensions:  S = 35mm diameter, 60mm length.  M = 40mm diameter, 70mm length.  L = 45mm diameter, 70mm length
Capacity:  S = 30mls, M = 30mls, L = 40mls
Stem: Short Thick (hollow?)
Measuring Lines: Unknown
Cost (RRP):
Been around since: 2017?
Unique Design?: Yes
Other Details:  Website measurements give the S and M cups 30mls capacity, but I wonder if the Medium size should be 35mls?  As the Medium is 10mm longer so should have a larger capacity.

Update — I’ve seen this same cup design also being sold as the Masmi cup.


January 10, 2018 - Posted by | The Cups | , , , , ,


  1. The Oi Cup is actually a rebranded cup from – it is not made in New Zealand – it is made in Spain, rebranded and sold in NZ.

    Comment by slinkybambi | March 31, 2018

  2. I’m not sure of the time on these, but the first one that I saw was Genial Day on Amazon in the USA. The box reads that it was “Responsibly made in Spain”.
    There are measuring lines and numbers in both oz and ml.
    Small: 5ml, 10ml, 15ml – 1/4oz and 1/2oz
    Large: 5ml, 10ml, 15ml, 20ml – 1/4oz, 1/2oz and 3/4oz
    The numbers and letters are backward like you’re supposed to be able to see them from the outside, but the cup is opaque so you can’t see through.
    The stem is only hollow a few mm down and then is a solid piece. I’ll try to send you a shot.
    There’s something else that I have a concern about…which I’ll send you a shot of as well.

    Comment by Red Herring | May 24, 2018

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