Sure, shake it up; it won't change it up that much. For as much time and hassle this toy requires, you're better off using a good lube and your hand; the clean up would be easier and you wouldn't have to wonder how to recycle it.

The Shakers Vol. 4 is a cheaply made TPE sleeve. He is a beginners sleeve for men who live in a dorm, have roommates, or may still live at home. He comes with a tube of water-based lube from Vanessa & Co. He is a little sticky at first and has a burnt smell to him. If you know how to read Japanese, you will be able to follow the written instructions, but there are pictures, if you don't. He may begin to squeak and rip at the seem after a few uses, but he will still be usable.

This is more of an actual "novelty" than a sex toy. Definitely wouldn't purchase this on my own, nor would my husband.