New 20 ounce tumblers available now! Forum donation credit with purchase. https://www.wildguzzi.com/Products/products.htm#Tumbler
Excellent find and rechargeable too! That's a great invention. I may have to ask a friend to buy a pair and then send them over.Now if we could get it controlled by our GPS (thread joke!), even better!!
Love to have these for my ski boots�..but I don't have a smart phone.
I hope they don't use batteries like Samsung phones or you could get a real HOT foot.
Seems they are over promising ... Dusty