This case is perfect for taking watercolors with you. It holds 20 halfpans, but can fit in a back pocket, yes even a pair or girl jeans. 
Because it is metal the paints inside will be protected and can be held in place with magnets. 
 
It is how I carry all my paints and I love it!
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I will put magnets on paints ordered with this case so you are ready to go!
 
*This is just the box