Paint Roller with the Paint in the Tube.
The PaintStick EZ-Twist draws paint directly from the can into its handle and feeds it onto the roller cover with a simple twist of the handle.
It works like a giant fountain pen, taking paint directly from the can and feeding it to the roller. You control how fast you paint.
This is shown for A$49.95 in Australia at www.paintstick.com.au
US$24.98 in the US at: www.homedepot.com and this site shows some reviews of the product
This shows the model with the feeder tube in the paint can, filling the handle with paint.
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