Top critical review
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"Hydrophobic Silicone Vent" allows condensation between walls.
on December 3, 2017
pro: They keep my iced tea cold for a long LONG time, but they are not cold to the touch on the outside of the glass.
pro: They don't sweat on the outside at room temperature (even at 50% humidity).
These are the reasons I keep buying them. I use them every day.
con: Very fragile. I've broken 4, all due to handling accidents on my part.
con: The ones with the silicone plug in the bottom started showing condensation between the walls starting with the very first washing in my dishwasher on 'normal' setting.
For these reasons, I would never give them as a gift.
rant: I started with 4 of the version that was fully sealed and had no silicone plug (maybe 15 years ago?). They NEVER had a condensation problem. (And still don't. --2 of the original 4 remain in service.)
Several years ago I bought 2 of this new version, with the plug, and both developed the condensation problem (which waxes and wanes, sometimes clearing up completely). After I broke those, I bought 2 more of the new version in 2017, hoping Bodum had fixed the condensation problem. Nope. Same ugly problem. (Aside: the originals weighed 4 ounces, and the new ones weigh in at 4.9 ounces, but are not visibly different in size. The heavier weight and silicone plug have not reduced breakage in my experience.)
Why, why, WHY don't they go back to the original fully-sealed design??? The new version is slightly cheaper, but the interior condensation is not worth the marginal cost savings. They are still expensive glassware, priced for the well-to-do, so they might as well do the job right.
note: All of my tumblers have been the 8 ounce size.
note: My father-in-law uses a plastic version, like those made by Culver, Tervis, and Boston Warehouse. At his house, I can plunk my "glass" on a marble table without experiencing breakage anxiety!