I was using a 2-handled training cup for infants and toddlers to consume Matchoffee: Anti-Oxidant Zero-Waste Drink Mix. However, the plastic cup turned out to be made of polyethylene terephthalate (PET), which has high melt temperature of 533 K, but low heat deflection temperature of 343 K. Unfortunately, boiling dihydrogen monoxide (H2O) deformed and ruined the Bibrachial Mug.
The non-PET plastic piece with arms was interference fitted to a wine glass for decoration.