Update 23AUG2018 - I added a long version for people who have escaping wasps! The extra long cone is harder for them to escape from. This is especially true of smaller bottles. This is the model I now recommend.
Update 18AUG2018 - I made the cone thicker as some slicers wouldn't slice it properly. It's now 1.0mm thick, instead of 0.5mm
I used the PCO1881 bottle cap to create my wasp trap. It is modeled in a similar design to the "Soda Bottle Wasp Trap" so I referenced it as a remix, although I only used it as inspiration.
I wanted the holes to be larger (10mm) as the wasps and yellow jackets couldn't enter the referenced design. My design screws on to a PCO1881 bottle (soda or pop bottle, usually from 12oz - 2 liter sizes.
I have tried sweet, beer, and protein concoctions and they seem to work at different times of the year. Proteins in spring and early summer, sweet or beer later summer and autumn. Please do not use baits that attract honey bees. Beer is preferred as honey bees are not attracted to it.
Please post your comments and makes.
Check out my other designs! https://www.thingiverse.com/mistertech/designs
NO SUPPORTS NEEDED. Also, you could print it at lower infill. I always print my models higher for added strength. The small savings in cost (less than a penny per print in this case), doesn't justify the loss of strength.
It took me 49 minutes to print using these settings (.20mm layers, 33% infill, 4 shells). I printed them in PLA. Bright yellow or white are the most attractive to wasps. Reds are invisible to wasps. The yellow PLA seems fine in the direct sunlight. I haven't noticed any softening or warping. It's cheap enough to print a replacement if there is a problem in the future. There are no real stresses on the trap after screwing it on to a bottle so I suspect it will be fine for the season.
Please post your comments and makes!
If you get stringing, just use a heat gun to melt the strings in the 5 side holes. You could also scrape them out using a knife. Don't cut yourself.