Cap for HobbyPark Driver / Screwdriver

I purchased a set of the very common allen wrench/hex key drivers on Amazon and was shocked they didn't come with caps on the ends.  Leaving them hollow was driving me crazy. This is just a simple cap to help keep me sane. It is also useful to color code the drivers.

I used rubber O-rings that I had on hand to secure the cap in a non-permanent manner. O-ring dimensions are 3/32" wide,  3/8" ID. Depending on which of the drivers you have, OD is 9/16" or slightly smaller.  

Print top of cap down. No need for supports. 

I've used these on three different sets of drivers with success.  The HobbyPark drivers that I originally purchased are linked below. 

 Amazon link to drivers:  https://www.amazon.com/gp/aw/d/B07YKJ1LBJ/?_encoding=UTF8&pd_rd_plhdr=t&aaxitk=c02e0a604ae6625f1f4bd11d5cffac5d&hsa_cr_id=5348385400101&qid=1695530416&sr=1-1-9e67e56a-6f64-441f-a281-df67fc737124&ref_=sbx_be_s_sparkle_mcd_asin_0_img&pd_rd_w=YivTD&content-id=amzn1.sym.cd95889f-432f-43a7-8ec8-833616493f4a%3Aamzn1.sym.cd95889f-432f-43a7-8ec8-833616493f4a&pf_rd_p=cd95889f-432f-43a7-8ec8-833616493f4a&pf_rd_r=5B19E20Z025CTFMRFTJQ&pd_rd_wg=13MZn&pd_rd_r=5da014f6-9b10-4e7f-9aa8-10cfac6148ac