Is this the Worlds Smallest Glass Klein Bottle?

Is the the Worlds Smallest Real Glass Klein Bottle?    If not I would like to purchase a smaller Klein Bottle.

We purchased these two Klein Bottles online years ago not knowing how small the smallest Klein Bottle actually was.  We accidentally threw it away in the trash with the wrapping for the larger Klein Jar.  If anyone knows where we can purchase a smaller Klein Bottle or comparable size please let us know in the comments as this one is no longer available from the klein bottle seller on eBay.

Dimensions of this tiny Klein Bottle are roughly 7/8” x 1/2” / 22.2 mm x 17.7mm.

The fluid these Klein Bottles are filled with is homemade UV reactive water (highlighter water).

See our video on filling a Klein Bottle “How to fill a Klein Bottle the Easy Way” https://youtu.be/bd2YiD9JXsk

I need at least two more medium to large klein bottles for some cool magnetic science demonstrations (magnets & math).

I searched online and found ACME Klein Bottles sells some really amazing Klein products including apparently the Worlds Largest Klein Bottle.  Not sure how small there smallest Klein Bottle is.  I will have spend some time on the site and check out all the klein bottle products, and probably go broke with multiples purchases in the process.

Clifford Stoll http://www.kleinbottle.com  apparently he is "The man with 1,000 Klein Bottles UNDER his house" Numberphile Klein Video https://youtu.be/-k3mVnRlQLU

We recently purchased a “Klein Bottle” Opener that Emily thinks may actually be a Klein “Bottle Opener”.

I don’t know we’ll have to try it and see.