During the current warm temperatures cold beverage can build up quite some amount of condensation on the table, especially when using glass bottles right from the fridge.
There always was quite some puddle below the (Sodastream in the picture) bottle which I was tired of so I designed these coasters.

The arrow/triangle pattern provides several purposes:

• hold the condensation
• wet surface does not stick to flat bottoms of drinks
• water in there can easily evaporate, no need to do anything

The lip around the coasters edge is a little bit higher so bottles/glasses don't slide off. Diameter is 90 mm.

The holder exists in two versions, one very basic and one more elaborate.

I have printed the coasters in transparent PETG which should make them quite resistant about getting wet all the time. And the higher temperature resistance isn't to bad for direct sun light or putting them in hot water (to clean them) as well, I guess.