Yes, why?
Are you going to use it for cooking bacon? If yes, then proceed.

The Yamame Virus is much more contagious than the common cold.

@Reader added Tags.
IYKWIM

Someday Kogasa and Yamame will make a good couple......on professional context!

Turn that thing upside down and you get the world's most evil wooden horse.

But ultrasonic welding doesn't really heat the workpiece, the heating itself is generally insignificant. The localized melting occurs due to absorption of ultrasonic energy (mechanical vibrations), not because it's heated...

If I bought one, I'd weld stuff all over like crazy! I'd cut the transparent folders on hand into the preferred shapes, then bind them. Then I'd play around with it for about two hours, get bored with it, and neglect it. :-)

Reader-added tags include "Yamame-hazard" (Resident Weevil?), "The transparent folders are waiting for you, Mizuki-sensei", and "So heating and welding stuff with vibrations ISN'T just a nighttime activity!!"

More healthy image choices for the survey:

If you're making a transparent folder, whose do you want?
• Yakumo Yukari
• Saigyouji Yuyuko
• Yagokoro Eirin
• Yasaka Kanako
• Hijiri Byakuren

Schrobby said:
Turn that thing upside down and you get the world's most evil wooden horse.

That's...really a frightening thought.

Now Kogasa-san wants something she has no practical use for. You know, I don't care if it's meant for that, or not, I'd still try to cook bacon on it, just because. Probably burgers, too, and other meats, because I'm dumb. Let's all get machines that we have no practical use for, and find a practical use for them!

For the poll, let's do Yukarin's folder.

For me: Eldest Daughter Peachy folder.