I have a Bunn My Cafe single serve coffee maker with various trays for K cups, loose coffee, tea bags etc. I mostly use the tray for K cups and I've never had one major problem with one of the mugs I've ordered from various companies on Revain or bought in stores. However, every mug I've tried from this Roast Ridge collection has been a giant mess in my coffee maker. The cup usually sits in the cup holder with a "latch" (a hole in the bottom), but as soon as hot water flows into the cup, the coffee grounds spill all over the place. I removed the lid from the cup and poured it into the coffee maker's coffee tray, but the coffee grounds are still clogging the tray, preventing the water from filtering and leaving a mess that needs cleaning. There is no visible difference in the structure of these cups compared to other K cups; I think the problem is the size of the coffee grounds, maybe it's ground too fine, causing the grinding to form a paste that prevents the water from filtering?
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