Micron cm-sb cups



Hi all,
Was looking around for side cups for the said brush and stumbled across a set of plastic pots with an adapter to fit the SB,
I'm looking at trying opaques and need to mix up some capped colours and was thinking these would be ideal for mixing and being ready to use, has anybody used these or can suggest something alternative?
Here's a link to what I found,http://www.custompaintshop.co.uk/plastic-cup-conversion-set
Those are cool almost ordered some myself to look at. But I decided not to get a side feed.
The Aztec ones make it gravity fed i would rather stay side fed as it would be less messy changing pots, but thanks for the replies, ill just order my first choice i think.