In the mid 1980s I purchased some hot caps in the shape of cones. They were smaller than a standard traffic cone and were frosted translucent. I would describe them as being made of a material similar to acetate, similar to celluloid, similar to what are used in new shirt collars as stiffeners. However not the cardboard ones. They came as a flat sheet and when rolled into a cone the edges met and locked together. The bottom edge had tabs that folded out with holes so that one could pin them into place with wires or long nails or whatever. The tip of the cone had about a 1Â½" hole for hot air escape and ventilation. The only drawback was they would sometimes collapse against a plant if blown by strong winds. As I recall they cost 88Â¢ each and when put up out of the sun each year lasted several years. Do any of you know if these are still produced and where one might get some? I've never seen them at all in catalogs. The ones I purchased came from the plant sales area of a grocery store.