It's a great looking cup, and a lot of fun, but has some faults.

It's nowhere near as sealed as the normal shakers, so trying to mix your Supps in this may likely lead to some spillage. It's also got the same lid as cheap re-usable coffee cups, and it's kind of hard to drink out of using the spout.
It's sturdy, and I'd say likely worth the buy if you want to archive your waifu cups and have something to sip out of, but it's a lot harder to shake than a normal...well...shaker.

i personally think the cup has a great look and has a high quality to it and find it very pleasing, it had quickly become my preferred cup up to recent and give it 5 star’s!

high quality and very basic so it works well with your favorite stickers

I use with bergur

Out of the other shaker cups I have purchased this has been much more comfortable to drink from and hold with its 'foam' texturing.
The double cup has also leaked far less than other cups though it does tend to leave a small amount of liquid as the lip of the lid doesn't allow it all to fully come out. All in all very good cup