The Graf Lantz Bierfilzl Felt Coasters do a pretty solid job with soaking up moisture. They’re made from 100% Merino wool, which, according to the manufacturer's description, can absorb quite a bit—up to 30% of its weight—without even feeling wet. That means no more coasters sticking to your cups or water rings messing up your tables.

Our research has shown that folks are quite happy with how these coasters keep surfaces dry without cups getting glued to them.

However, they're not perfect. In some trickier situations, like when you're using them with super icy drinks for a long time, they might hit their limit. A few people noticed that after a while, the coasters can start letting a bit of moisture through.

So, picture a hot day with a super chilled drink, and eventually, you might spot some water sneaking onto your nice wooden table. It's not a huge issue, but just something to keep in mind, especially if you're into drinks that drip a lot.

Most people find these coasters just right for everyday use and regular drinks. They’ve talked about how the coasters don’t get sticky and generally keep things dry. One person even mentioned they didn't wear out from moisture, and others were satisfied with using them for iced drinks.

If your drinks tend to sweat a lot, just check them occasionally or swap them out if needed.

Overall, these coasters are a nice mix of style and usefulness for usual drink situations. They should do well in your daily routine. Just be aware of their limits if you're dealing with a lot of condensation, and you should have no problem enjoying them.