I didn't see any info about their use on that site. I was thinking about cutting off the bottom and stem, drilling a water hole, and using them to grow strawberries. Wouldn't want them to rot after all that work.
Name: Sandy B. Ford River Twp, Michigan UP (Zone 4b) (Zone 4b-maybe 5a)
TK, I've never grown that particular variety, but they are a hard-shell gourd (Lagenaria) and once cured should be "hard." But, being plant material, I don't know that they would hold up to something like being a planter for strawberries....
“Think occasionally of the suffering of which you spare yourself the sight." ~ Albert Schweitzer C/F temp conversion