Just finished a project I’ve been wanting to do for years. I created a plastic bag carrier! My hands would turn red blue and purple carrying my weekly groceries up 3 flight of stairs to my apartment. This should take away all of the discomfort. If my beta testing holds and this part doesn’t fail epically, I’ll upload the stls to thingyverse.
This is a good idea !
Just tested it with 8 bags and about 40lbs of groceries from ice cream to canned soup. No cracks or failures of any kind. No visible evidence of stress or wear either. Having two, one for each hand, might be the best setup. Time to get printing! The project will be on thingyverse tonight.
@Jules_Hoehn you should patent that .
I think something similar might already exist, but I’ve benifited alot from other people’s free designs on thingyverse so this one will stay free and open in the hopes I can pay back the community a little. 
That is very nice of you !
there are many things for the same purpose, this one is a really well thought piece. what kind of infill did you use? In my opinion, if you make concentric infill, that would make it incredibly tough… and some thick layer as possible
.2 layers, .8 shell, 30 infill. What ever cross hash cura does by default. The handle takes about 5 hours and each hook takes about 30 min. Not too bad considering how much nicer it makes carrying a lot of plastic bags I wanted to build something lite comfortable and durable with modular hooks in case someone breaks a hook you only have a 30 min fixer print and not a 6 hr replacement print. The tolerances are loose enough to allow some flex, but not enough to let the parts move so much they fail. I also designed it to take advantages of strength and load bearing properties of the orientation of the layers. Looking to make them as Christmas presents this year 
Got the thingy files uploaded in case anyone else wants to make one for themselves. The hardware I used was an 1 inch 8/32 Aluminum binding post" I found in a box in the back of ACE Hardware. I didn’t know what the name of the part was, but the meta bolt sleeve and the very low profile ends make for the perfect application ($0.95/ea). No snags, no sharp edges, and you can finger tighten if you like ( I did)
Cool design. Not to be a buzzkill but I’ve been achieving the same thing for years with a large carabiner… this is better since it keeps all the bags separate though, and of course you can print it at home
Ya, I’ve done the carabiner thing before, works better than nothing. 3d printing my own custom part makes for a much better fit
Oh I’m totally going to make one, just saying
@Mark_Rehorst that is an excellent idea!!
fyi - I come from the advertising promo market and you can find a one pice unit that will simply have a " U" slot groove thru the upper topside of the lower handle area - so the plastic bag will catch on there.
SImpler and easier ot print probably …
@JOHN_YN I had several failed prototypes that made similar design choices. Finally opted for the modular design for strength and the ability to replace parts easily in the event of a failure. And I was wanting to make something that was my own it would be interesting to see if the user experience preferred one over the other.
People have been making things like this for years (eg http://www.thingiverse.com/thing:26767) but I like the arrangement on this one. Good work.
Congrats I know the feeling.I’m disabled and walk with a cane so I carry everything with one hand.I think my one arm is at least a foot longer.Would like to get one.Stece
@Steve_Marcotte the parts can be downloaded for free on thingyverse then its just matter of getting it printed.
suggestion - make the hooks all one piece front to back and add a groove for each for handle - that way - no screws needed
@JOHN_YN
My original designs did not incorporate any hardware. I wanted to finally CADD something that required some sort of fastener to experiment with different tolerances and fits and to make it look more professional and intentional (not a fan of parts that look like they belong in McD kids meals). I have been playing with the idea of printing pins that can be used to secure the hooks, but the “sheer” forces perpendicular to the Z on the printed pins could cause issues. I guess if the pins are printed left-right rather than up/down that would be sound engineering. As for your suggestion, I assume you are talking about making the hooks one piece. Can you print your idea without supports? I liked to CADD and print without supports so that factors heavily into many of my designs.
Try remixing the part on #thingiverse I would really like to see what others come up with. I really doubt my design is perfect ( it is for me anyway ).