The DIY k-cup option requires a little work, but will level up your #coffee game.

You need a good grinder and great beans (like ours!).

Search for a burr grinder (I use capresso about 100 bucks and will last a decade). Buy a reusable k-cup.

Then grind, fill, and brew. Takes a few more minutes and a bit more of a mess but much better coffee if dead set on keeping the Keurig.