I found the mini poker chips sold by Discount Poker Shop very convenient for Board Games. Small enough to carry or throw inside a game’s box, but heavy enough to feel better than cardboard coins. The problem is that they do not sell a nice case on that shop. Fortunately I have 3D Printers, and I know how to design this kind of stuff.
The tray design comes with a lid, and I also added magnets to connect it to other board game trays.
Design available on Thingiverse. Multiple designs available for different quantities of chips.
You can purchase on Etsy.com.
You can purchase the chips at Discount Poker Shop.