But queries have come from as far away as South Africa, where the soil often lacks the depth needed for ordinary burials.
There may also be sales potential in countries where religion makes cremation difficult or impossible, such as Muslim countries.
And Swedish designers have been stirred into action by the new method, focusing their attention on making containers which are smaller than traditional coffins, but larger than ash urns, and biodegradable.
Stockholm design graduate Linda Jaerned has made two prototypes for those who would like their freeze-dried remains to be buried in a container, rather than just mixed with soil.
One is a soft tube made of felt, resembling a paper dragon in a Chinese New Year parade, while the other is a more traditional-looking box made of plywood and linen.
"I think this is the future. We don't have so much space for the dead. The living will take more and more space," said Jaerned.
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