Whipped this up this morning.
Not sure if it's heavy enough though. It's filled with rice that the weevils had gotten into :) Waste not want not! Perhaps sand would be better? But then it might trickle out through the seams ... hmm, I'll just wait until a windy day and see what happens. This is the tutorial I used, http://allittook.blogspot.com/2008/01/pryamid-door-stop-tutorial.html, very easy to follow photos and directions, thanks Rachael!
And check out my first post on I Op Therefore I Am.