Product Overview Medline Bubble Humidifiers Come in Several Sizes and Configurations. For respiratory therapy, with or without adapters. For Use With 040 Humidifier Adaptor. Easy snap-off trigger design. 650 mL With 040 Adaptor.10 Each / CasePart Number(s):HUD00640 Reviews (1 review) Write a Review 1 Review Hide Reviews Show Reviews 5 Overall Experience Posted by Pooh on Oct 8th 2020 So pleased with Cascade Healthcare Solutions. Everything from website navigation, product description, ease of ordering and extremely fast shipping! The Aquapak Sterile Water was as described.