Solar Radiation Shield for Onset's HOBO U23 Pro v2 Temperature/Relative Humidity Data Logger. You can install any small devices in it. e.g., SwitchBot Indoor/Outdoor Thermo-Hygrometer (https://www.switch-bot.com/products/switchbot-indoor-outdoor-thermo-hygrometer). I confirmed that this works as well as Onset's very expensive solar radiation shield (RS1).
The Onshape Document is available below.
https://cad.onshape.com/documents/b682a7956f903e31f9ca8ee6/w/25176f20d8459132a2a7558b/e/eb60c6558451cfcf0839d66a?renderMode=0&uiState=6698d31810e7e04019648b2b
The author marked this model as their own original creation.