Merch question on Twice Japan Christmas theme items

Hey everyone! Have you seen the Twice Japan merch just announced yesterday? There were a ton of new items but I'm torn between getting one of these two.

Question, any idea what do you think the material is for the TWICE LOVELYS mug cup? I'm curious if Twice has done this type of merch before and if it's ok to put warm drinks in it like coffee or tea (yes, I use my merch… like I like going out with Twice-branded stuff I can carry. I hope that doesn't sound like a blasphemy or something to other fans). I would prefer the mug cup, but if I can't coffee with it, I'll go with the blanket.

I got the baseball shirt from the previous Japan RTB tour (the dark blue one) and I could say the fabric is pretty ok than expected, since I was expecting merch materials to be cheap to maximize profit. I bet the blanket would be pretty much the same mostly-polyester fabric with print and embroidered Twice logo and "Holiday Morning".