warning! don't watch if hand-held video bothers you! just fast-forward to the end of the video to see the swatch page if you're interested, and look below for links to the paint makers.

Beam http://www.beampaints.com
(I wasn't clear: the mixing trio comes as a little tester set or as a full size set)
Julie Maggi https://www.etsy.com/shop/JulieMaggi
Red Clover Meadow http://www.etsy.com/shop/RedCloverMeadow
Tiny Watercolor Art http://www.tinywatercolorart.com
Staycee Illustrations https://stayceeillustrations.co.uk/