Salt/Pepper Grinder Holder

I designed a Holder for the following electronic salt/pepper Grinder: https://www.amazon.de/gp/product/B0C1P8CDMB/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1They came with a charging station but i don't want to charge them everytime when i put them back, because this reduces the lifespan of the battery.So I designed these holders. I put double sided tape underneath it, so it doesn't slide around.