I used the VonKitchen Handheld Milk Frother. We have had it for over a year now, and it still works great! It works for both warm and cold milk, and half n half. Cleans with a run under the tap and a whiz to dry. The battery lasts a good long while as well. Makes your java more of a treat than just a caffeine IV.
Link to product on Amazon: https://smile.amazon.com/gp/product/B01347C2E2/ref=oh_aui_search_detailpage?ie=UTF8&psc=1