My husband and I used this toy during foreplay. He used it on me... I like my glass toys warmed up a bit so
we run it under hot water. You can also use it as is for a cooling sensation or make it even colder by running under cold water. Jupiter is double ended so you are able to switch back and forth and have two toys in one. The different ends provide sort of a variable girth. You can start with the small end to warm up and then finish with the large end. Due to the length of the toy you want to keep a firm grip on it so that you don't push too much. As far as anal use I would also be careful with that. Due to the fact there is not a big base on it you may have problems if you push too far.

Glass toys are great for about any application. They work well with all types of lubes and clean up is super easy. You can do temperature play (warm it up in water or cool it down) and because of the material it won't crack. If you do happen to drop the toy this type of glass is similar to car glass so that it would crack instead of shatter. Glass is not going to ever feel like a real unit but it does have a nice smooth texture to it and the ribs were also nice and smooth with no rough edges. The ribs really make this work well. It gives sort of a variety to it.

The design of it is good but may take some learning to master. It's 8 inches long which sounds super long at first but in your hands it's smaller.
You can see it's roughly the same length as my husbands hand.
We sort of used it like you would expect. Two toys in one. The girth of it on both ends are manageable and should be no problem. My husband would hold one side in his hand and use the other. Picture two separate dildos mounted together. A small one (looks like it would be good for anal) that starts off small and tapers up:

And a large one with a rounded end (picture penetration from the tip of a penis) that has some girthy rings:


The red satchel that came with it makes it semi discreet and the material (glass) lends itself well to travel.

The double ends being of various girths allows for a warm up toy and then you can switch to the other end for more fun. The ribs are a great addition to the design. While this toy definitely created a pleasurable experience, I was unable to climax while using it.

The Jupiter can be cleaned in the dishwasher but it is also easy to clean with toy cleaner. We used it with lube and it worked well. It is supposed to be compatible with any lube, we only tried one kind but were happy with the results. Jupiter comes with its own red storage pouch which helps with storage but I would recommend something with more padding if you are wanting to travel with it or desire some amount of protection during storage.