Sooo, that happened… I tried to “dry” a #hygroscopic #crystal ( #sylvine, #KCl) from a set of minerals and the plastic box melted… I thought it would be able to withstand 100°C… Damn, well, new box arrived (crystals have been transferred). Shopping list: porcelain cup that doesn’t melt at 100°C. 🤣🤣🤣