The Nelson bottle was the first magic trick I put into my show almost 25 years ago, I also owned the vanishing sharpie a couple years ago and currently am doing refilled in my show, when i saw these I was excited until I saw some negative reviews after I ordered it online and truth be told I was less than impressed after the unboxing. I was under the impression I could wear these and go into the effect and perhaps you can but find taking them out of the case is the best method due to the flimsy gimmick.(the flimsy was the let down) the other negative was the cases inner linning and how the gimmick material static attracts the red velvet lint. My grumps and gripes aside I went out and performed it that day after watching the very very short tutorial.(in a very short time everything is explained) I performed this three times that day and slayed every one that witnessed it. I often hear, in regards to the bottles that it's rubber, perhaps this is due to exposure from TV or the Internet or just a logical assumption even children can come to. I've performed it at least twenty times now for single spectators and large circle shows and not once has anyone come to the conclusion on how the effect is done. The misdirection of the glasses appearing in the case gives plenty of time for clean up. I think wonder makers gets a bad wrap from reviewers and magic producers maybe because they are Russian? I can say this and the other effect I own by them, Wonder Card are top notch and I am eagerly awaiting their next release.
Smilesotheylikeyou