Sandtastik Sparkling White Play Sand, 25 lb (11.3 kg)

I got this one from Amazon that fits 2 spools no problem, but I ended up using it way more for food since I didn't have an air fryer before I got it. It's perfect for drying filament and big enough for annealing PA6CF prints, and it's great at cooking frozen chicken patties and burgers. It has a ton of good reviews too and it looks nice in my kitchen. I would definitely get it again if I had it to do over. https://www.amazon.com/dp/B09B7SB46R For PA6CF, I dry the spools at 100C for 6 hours before the print, then anneal the print at 80C for 6hrs in a turkey tray filled with fine playground sand. Never had any problems with warping with this method.