You have to respect the wood.
In addition to the condensation, I have also used coasters for under hot drinks like coffee as they can discolor or even deform some surfaces.
If all you drink is room temp liquids you don’t need coasters.
Ever have your coaster stick to your glass or cup. Follow this trick! Shake some salt on the coaster. It will never stick!
Got it. So what’s the order. Lick coaster drink shot of tequila bite lime? Or bite lime, drink tequila shot then lick coaster.
It depends on the humidity of where you’re at. On a warm day in Houston, for example, it’s not at all uncommon for water to condense on the outside glass of a cold drink, run down, and eventually damage the wooden table it’s sitting on. A coaster will help prevent that damage.
Additionally to what else was said, I’ve seen them used in beergardens to cover the drink to prevent bugs from drowning themselves in your drink. I guess then the coasters don’t serve to protect the table anymore.
Try thirsty stone coasters. I found a really large thirsty stone trivet which I use. Combine with tervis tumbler for the ultimate drinking setup. Lol. For spilling; try a straw. Or try a baby sippy cup?