Can I put my 1st gen AirPods in a 2nd gen case

Connect and use your AirPods and AirPods Pro - Apple Support

Says: "If you have both AirPods (2nd generation) and AirPods (1st generation), make sure that you keep them separate. Your AirPods won't charge if you put one of each model in a charging case." which implies to me you can charge them in a different generation's case.

I also note that the Wireless Charging Case for AirPods - Apple Store Online hhttps://www.apple.com/shop/product/MR8U2AM/A/wireless-charging-case-for-airpods does not appear to say it is only for one particular generation.