A multi-well fluid container for use in an in vitro diagnostics automation system comprising: a container body comprising: a first well having a first well size configured to hold a first fluid and having an openable first well closure that covers a first well opening, the first well opening is configured to provide access to the first fluid in the first well via the first well opening when the openable first well closure is opened; and a second well adjacent to the first well, the second well having a second well size configured to hold a second fluid and having an openable second well closure that covers a second well opening that is separate from the first well opening, the second well opening configured to provide access to the second fluid in the second well via the second well opening when the openable second well closure is opened, wherein the openable first well closure comprises: a first sealing portion configured to be opened by a first cannula, and the openable second well closure comprises: a second sealing portion configured to be opened by a second cannula, wherein the first well and the second well each comprise an anti-evaporation tube (412, 418), wherein the first well size of the first well is different than the second well size of the second well, wherein the first well is configured to hold a low volume of the first fluid and the second well is configured to hold a high volume of the second fluid that is a larger volume than the low volume of the first fluid and wherein the first openable closure and the second openable closure are configured to be automatically opened while on board an analyzer. a first well having a first well size configured to hold a first fluid and having an openable first well closure that covers a first well opening, the first well opening is configured to provide access to the first fluid in the first well via the first well opening when the openable first well closure is opened; and a second well adjacent to the first well, the second well having a second well size configured to hold a second fluid and having an openable second well closure that covers a second well opening that is separate from the first well opening, the second well opening configured to provide access to the second fluid in the second well via the second well opening when the openable second well closure is opened, wherein the openable first well closure comprises: a first sealing portion configured to be opened by a first cannula, and the openable second well closure comprises: a second sealing portion configured to be opened by a second cannula, wherein the first well and the second well each comprise an anti-evaporation tube (412, 418), wherein the first well size of the first well is different than the second well size of the second well, wherein the first well is configured to hold a low volume of the first fluid and the second well is configured to hold a high volume of the second fluid that is a larger volume than the low volume of the first fluid and wherein the first openable closure and the second openable closure are configured to be automatically opened while on board an analyzer. a first sealing portion configured to be opened by a first cannula, and the openable second well closure comprises: a second sealing portion configured to be opened by a second cannula, wherein the first well and the second well each comprise an anti-evaporation tube (412, 418), wherein the first well size of the first well is different than the second well size of the second well, wherein the first well is configured to hold a low volume of the first fluid and the second well is configured to hold a high volume of the second fluid that is a larger volume than the low volume of the first fluid and wherein the first openable closure and the second openable closure are configured to be automatically opened while on board an analyzer. a second sealing portion configured to be opened by a second cannula, wherein the first well and the second well each comprise an anti-evaporation tube (412, 418), wherein the first well size of the first well is different than the second well size of the second well, wherein the first well is configured to hold a low volume of the first fluid and the second well is configured to hold a high volume of the second fluid that is a larger volume than the low volume of the first fluid and wherein the first openable closure and the second openable closure are configured to be automatically opened while on board an analyzer.