I find 4 versions of the GB-187 on YinMing5's website and they all look exactly the same to me. Can anyone tell me what the heck the difference is between these 4 items? For $32: https://www.dhgate.com/store/product/new-hot-sell-the-newest-glass-bong-glass/413836675.html For $22 https://www.dhgate.com/store/product/hot-sell-best-price-bong-glass-smoking-pipe/397760004.html For $29 https://www.dhgate.com/store/product/2015-mobius-hot-sell-the-newest-glass-bong/264674279.html Also $29, but with a different model number than the one above: https://www.dhgate.com/store/product/hot-sell-the-newest-glass-bong-glass-smoking/188885599.html WTHF? I can't see any difference between these. Can any of you?