The headline read "butt plug" but I missed the text that said "Sleeve". So I was surprised when I got a hollow thing too floppy to insert. But then I tried it and your imagination is the limit, within reason. It's very stretchy and can accommodate anything including cucumbers, your other butt plugs and even Barbie dolls (I taped her hands and feet, fearing they were pointy enough to damage the sleeve. They might not have but I didn't want to risk it). Until they make a wider range of buttplug sizes (they seem to go from too small to too huge with no selection between) this is a wonderful tool to stuff with things appropriate to your experience level.
The only drawback? It stains easily and has a slight brown tinge after the first use, that soap, water, bleach and alcohol won't remove.
To be blunt, I thought this toy was far more rigid than it really is. You take it out of the case and it just kind of flops around. The material is soft and feels great, but sadly this toy didn't last very long. In all honesty I didn't read the item description closely enough and failed to notice that you should use water based lubes. So, about three coconut oil fueled sessions later, it ripped on us while my partner slipped it on.
Besides that mistake on my part, it's a fun toy to use but expect to always put it over something (or someone~) before play because it's not sturdy enough to use on it's own.