The best thing for an iced frappe, the best I have ever used in a frappe glass, it keeps the frappe cold for a long time and most importantly, it has a stainless steel straw. I believe it is worth every penny and I say this because in the past, any frappe glass I bought would barely last one season

Beautiful aesthetically! I cannot have a full picture of the properties it claims to have for temperature preservation as I have not tested it thoroughly. However, for its price, I consider it very worthwhile!

Everything is fine except for the fact that it traps water in the lid during washing, which doesn't escape at all, and I don't know how healthy it will be after some time of use.

For what it provides, it is a satisfactory purchase. It will definitely withstand much more than a conventional plastic counterpart. I would like the lid to have a better fit when closing, sometimes it is difficult and the main issue is that during washing, water gets trapped between the stainless steel part and the plastic part, resulting in difficulty drying.

It maintains the temperature really well, no matter what drink you put in it, just as it promises (the ice cubes stay for hours)!
Advantages: Good construction, large capacity, stainless steel straw, secure closure.
Disadvantages: The lid, after washing, retains a little water between its two walls (you need to shake it well to get it out) and sometimes you can slightly taste the stainless steel, maybe influenced by the temperature of the coffee or the fact that you're drinking with a stainless steel straw.
However, its pros are more significant, it's worth its money, I would buy it again!

Thermos, I don't know if you can call it that since it simply has a double stainless steel wall. However, it is very well constructed, it doesn't break, it doesn't leak, and you don't have to deal with plastic. I have spilled many coffees on and around my desk and I know!

Update: After a few weeks of use... the lid is not well insulated, so when you wash it, it retains water (between the metal and the inner plastic lining). This water remains trapped... you have to shake the lid well to get it out and it still doesn't completely go away.