New 20 ounce tumblers available now! Forum donation credit with purchase. https://www.wildguzzi.com/Products/products.htm#Tumbler
I installed this one from Amazon on the center of my handlebars. Wanted one with an on/off switch since it's direct wired to the battery. Unbolt the rear of the tank and lift it a little to fish the wire through.https://www.amazon.com/dp/B07F37JV5M/ref=twister_B07MFPC51D?_encoding=UTF8&th=1