Korui
www.korui.com.br [Translated into English]
Country of origin: Brazil
Composition: Medical Grade Silicone
Sizes: “Light”, “Normal” and “Intense”
Dimensions: Light = 41mm diameter, 70mm long including stem (47mm without stem). Normal = 43mm diameter, 70mm long including stem (49mm without stem). Intense = 45mm diameter, 70mm long including stem (51mm without stem)
Capacity: (to airholes) light = 25ml, Normal = 29ml, Intense = 34ml
Stem: Flat narrow tab
Measuring Lines: Yes
Cost (RRP): R $82 (Brazilian real) [Currency Converter]
Been around since: 2016
Unique Design?: Sort of (See below)
Other Details: Similar in design to other cups with flat narrow stems, however this cup does have a few design elements different to other cups, such as the rounded tip on the bottom of the stem and the shape of the ridge around the top of the cup. Appears to come in a range of colours (blue, orange, green, purple, yellow and deep red)
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About
A menstrual cup is form of reusable menstrual protection. It is inserted into the vagina to collect menstrual fluids. Once in place it forms a seal, preventing blood flowing out of the vagina by collecting it in its “cup” shaped reservoir. Unlike a tampon which absorbs the blood along with the vagina’s natural secretions, a menstrual cup simply holds the fluids until you remove it – so they do not dry out the vagina and do not hold the TSS risk that tampons do.
They hold around 20-30ml, which is for most women will cope with a full day without emptying, and at most perhaps you would need to empty it a few times a day for a very heavy flow. A menstrual cup will last (with proper care) for around 10 years, perhaps longer, so while the initial outlay is high, it pays for itself with savings pretty quick.
This is a sister site to www.clothpads.org. For information on cloth pads, please check that website.
This blog is a place to find information about the different cup brands I know about. All the brands I am aware of, are listed in the menu – Clicking on these brand-name links will take you to a page of information I have about them.
Menstrual Cups 
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