# Refilling the Lilly KwikPen disposable pen

**URL:** https://forum.fudiabetes.org/t/refilling-the-lilly-kwikpen-disposable-pen/1725
**Category:** Tips
**Created:** [August 26, 2017, 3:25pm UTC](https://forum.fudiabetes.org/t/refilling-the-lilly-kwikpen-disposable-pen/1725 "2017-08-26T15:25:35Z")
**Posts on this page:** 1
**Showing post:** 20

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### Author: ![Eric](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.fudiabetes.org/eric/32/9209_2.png) [@Eric](https://forum.fudiabetes.org/u/Eric)
#### Post date: [September 28, 2017, 2:15pm UTC](https://forum.fudiabetes.org/t/refilling-the-lilly-kwikpen-disposable-pen/1725/20 "2017-09-28T14:15:45Z")

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> [@Sam](#):
>
> Crap this isn’t even the thread I meant to be commenting on I thought this was the one where he showed how to refill a kwikpen not a cartridge—

You can refill either a cartridge from the non-disposable Lilly pen, or a disposable Kwikpen which has a built in cartridge. Either one. Here is the other thread:  
[filling-your-own-pens](https://forum.fudiabetes.org/t/filling-your-own-pens/1111)

If you fill it with 300 units and flush it as fully as you can each time, after the 3rd flush, this is the purity of the insulin you have in it:  
0.9999997905950370000

Each time you refill it, it moves more toward completely pure. Of course it never gets to 100%, but when you have something like this, 0.9999997905950370000, I think you are in good shape.

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