Try the RSA-ProX™ in MicroSolv’s MRQ Vial and Cap kits (shown) which have a volume of 1.2 mL and a very low residual volume of 2 ul due to the center-draining effects of smooth walls and a conical bottom. 2 ml and 1.8 ml center draining vials are also available.
RSA-ProX™ MRQ Vials and Caps