Butt plug question: round base vs. T-shaped base, which one is…

Hi everyone! I’m currently looking for a butt plug that I can use long term while working. I know Amazon can be a mixed bag but I’m considering glass or metal. Price isn’t necessarily an issue but I wouldn’t feel so bad if I didn’t like it. I’m worried that the round bottom won’t be enough to hold the toy inside. I’m also worried that the T-bar will be too long and uncomfortable to wear? My safety is my priority so I don’t want to get in the way. Has anyone used these butt plugs or can recommend a better glass butt plug? Round bottom: T-bar bottom:

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