ARTISTRO 20 油性パーマネントペイントマーカー - 中字タイヤ、木、岩、布、ガラス、セラミック、金属、プラスチックなど用 - 速乾、防水

I was worried about the tip clogging up, but it's flowed smoothly through an entire afternoon of decorating river rocks for my garden. The quick-dry finish means I can stack them without smudging, and they've held up through a surprise rain shower.

The ink flows like butter and dries fast enough that I didn't smudge a single letter on the glass jars I decorated. I've left them on the windowsill for two weeks now and they haven't faded or chipped a bit.

Used these to sign some plant pots and a glass jar, and the paint went on buttery smooth with zero skipping. Dried fast enough that I didn’t smudge anything, and even after a week of watering, the letters haven’t chipped or faded.