It feels silly to have a full set of dumbbells and kettle bells in a home gym, but they get used in very different ways that don’t really cross over. You’re also often using very different weights. On top of that, if you’re travelling, the odds of the hotel gym even having kettle bells is low. Enter the Kettle Gryp. You just snap it on the handle of a dumbbell and you have a kettle bell. Genius. Simple. Portable. Cheap. Those are all adjectives I like. It’s design and light weight let it easily drop in your suitcase to travel. Obviously, the dumbbells are going to be wider than kettle bells, but nothing that would really get in the way of the workout. You can get one now for just $35.