DDs and I don't stay at hotels very often, so I found this rather humorous.
At the same time I thought it somewhat rude (sly? rip-offish?) of the hotel to do this . . .
We had a spa day (different thread) and finally got to our hotel room. There were 2 water bottles on the table. DD#1 immediately grabbed one "I'm so thirsty!" She took the tag off and drank about 1/2 of the bottle.
A little while later, DD#2 wanted some water so she took the second bottle and read the tag (all about the environmental friendly bottle, etc.) and in very fine print at the bottom of the tag it stated that a $4.00 charge will be added to the room if the bottle was used.
The funny part was that once we read the water bottle tag we were looking all over and joking about what the extra charge would be if we used the robes in the closet, or the soap and body wash in the bathroom. When I made coffee the next morning DDs asked me if I read the fine print! "Mom, that pot of coffee is probably going to cost you an extra $10! Oh! and did you open the condiments package? Do you know how much that packet of sugar costs?"
We did have a fun time with this, when we were packing up the next morning I put a pen in my bag. DDs asked me "How much are they going to charge you for that pen?"

I think that the water bottles on the table were a rip-off simply because they weren't clearly marked as an extra charge.
Everything else . . . soap, lotion, coffee, pens, use of robes? That should be an included amenity, right?