An update of my post from September 29, 2011, the Sinus ashtray by Walter Zeischegg for Helit. Here is the ashtray in red and green but in an alternative style.
84030 Sinus ashtray, stacked. Image source: eBay.
The 84030 model is different from the 84005 and 84009 models in that the “waves” are shifted so the edge has three wide parts and three narrow parts instead of the edge being the same height all the way around. The ashtray rests on these three wide parts. The ashtrays were described as being 13.5 cm in diameter by 6.5 cm height. All images from eBay.