Himal Outdoors Insulated Food Delivery Bag XXXL-23Wx15Hx14D inches Premium Insulated Grocery Bag for HOT/COLD Food Delivery, Fit for Uber Eats, Doordash, Commercial Catering Transportation

Catering bags, these are more expensive but they're actually insulated and work unlike the cheaper ones which are just cotton with stitched aluminum foil: https://www.amazon.com/Himal-Outdoors-Professional-Transportation-23Wx15Hx14D/dp/B08ZXHBLYY/ I wouldn't blame anyone who doesn't want to fork over $100 or more for 3 or more bags so another alternative is the insulated bag from Academy: https://www.academy.com/p/academy-sports-outdoors-tote-bag-sport-cooler?sku=blue&gmc_feed=t Much more reasonable at $8 each and you can just use them strategically, IE the first dropoff probably doesn't need insulated bags but the big order where the final stop is 20 miles away and sitting in your hot trunk gets higher priority.