weekly Layton puzzle #005

Professor Layton and the Unwound Future puzzle 041

Thirsty Work

Rubbing his back, the waiter sighed wearily and said:

"I always use the same box to carry as many glasses as I can at a time, but there's one type of glass that I really hate carrying."

Of the four glass types pictured here, which one is the waiter talking about? Keep in mind that they all weigh the same.

Which type is the waiter talking about?

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