For the best effect please follow the instructions implicitly!1) Fetch glass2) Add wine to glass3) Print it4) Add suckers, mine came from ebay just search for "Suction Cup 40mm Round Button"5) Fix holder to tiles6) Refill glass with wine7) Fill Bath!8) Refill glass with wine9) Insert glass into holder10) Enter bath11) Refill glass as required12) Enjoy
Technical
Suckers came from ebay just search for "Suction Cup 40mm Round Button"
It's been ok so far, my only worry would be if the suckers started to wear but then I'd expect the holder to slider down the wall. Or I'd be more worried about missing the holder altogether after drinking too much ;-)