Now you, too, can own a HankTube!
Elegantly handmade on a Knifty Knitter (yes, it's meant be a little raggedy and uneven), this unique item will keep your cat toasty... if a little irritable.
I haven't figured out how to close it up at the top, so your HankTube will eventually unravel... but this just means it serves the additional purpose of reminding you of the fleeting nature of all things.
A tube for your cat... and deep, philosophical contemplation for you. You'll wonder how either of you ever managed before the HankTube!