We currently produce craft kits for a customer that wants us 
to include a water color set of 8 colors with every plaster craft set.  
The plaster craft set includes a bag of plaster that will be mixed 
with water in the tin and will harden.  It will then be painted.  
The plaster sets are packed in 5 sizes of round tins that are 
sized as follows: (1) 100mm, (2) 112.5mm, (3) 125mm, 
(4) 140mm and (5) 155mm diameters.  The water colors will 
be on round card board stock that will be 6.5mm smaller in 
diameter than the sizes shown above and should be approximately 
1/8\\\" thick (includes the cardboard stock as well as water colors.  
We will use a total of 300,000 - 500,000 water color sets per year.  

We will either use 5 different sizes as shown above or 2 different 
sizes to fit all five tins (93.5mm and 118.5mm diameter).  I prefer 
the water color shape to be round but they can also be set in a circle 
in the shape of a pie.  

The water color sets will be placed on the outside bottom of the 
tins (there is a raised bottom approximately 7/32\\\" h). We will also 
need a brush that will fit inside the different sizes of tins as explained 
above.  I am open to ideas.  This is a very serious inquiry.   
Thank you.  
Sincerely