I bought them on amazon. https://www.amazon.com/dp/B07FKL7G7G/ref=cm_sw_r_cp_api_i_74HXCbTA2MTTE This was my first time not using a name brand like Ball so I was a little nervous but they sealed great. They say $35 for the 40 but there was one of those amazon coupons for $4 off when you check a particular box at check out.
Mason Jars 4 OZ, VERONES Canning Jars With Regular Lids, Ideal for Jam, Honey, Wedding Favors, Shower Favors, Baby Foods, DIY Magnetic Spice Jars, 40 PACK https://www.amazon.com/dp/B07FKL7G7G/ref=cm_sw_r_apan_i_2KXXKE4NEA817XJEHMTS?_encoding=UTF8&psc=1
Had another user recommend these. They're more for storage and not viewing so the glass isn't going to be as clear as a petri dish, but clear enough to spot contamination. I've used them for no pour tek with no issues yet.
VERONES Mason Jars Canning Jars,... https://www.amazon.com/dp/B07FKL7G7G?ref=ppx_pop_mob_ap_share