Thankfully, Hilton Glasgow still uses the (far better, IMO) Molton Brown products on Exec Floors. I've never seen the "relaxing water" here during many stays, but have seen it at several other Hilton properties throughout the UK and Europe, including Hilton Glasgow Grosvenor and Hilton Strathclyde, both of which are also in Glasgow.
Perhaps PhxArisen's stay was at one of these properties? Or perhaps the non-exec rooms have the non-Molton Brown products?