Brewista's revolutionary redesign of the classic hourglass brewer works with virtually any style paper filter; square, circular, full cone, flat V cone and standard or tall basket styles. You can use the filters of your choice. The patent pending vent tube and ribbed interior make it possible. Together they prevent the vacuum which leads to overflow during the bloom. The ribs also keep filters from sticking when wet, so removing grounds is simple and neat when you are ready to pour. An innovative dual spout design provides smooth serving without splashing. The ergonomically designed profile and non-slip, heat resistant silicone wrap make it easy to handle. Durable tempered borosilicate glass maintains temperature without cracking under quick temperature changes.