When going to vent them, cover the bottle cap with one hand to prevent shrapnel from shooting everywhere, while using your other gloved hand to pop the swing top. If it's going to explode, this is most likely the time it will happen.

How much pressure can a flip top bottle hold?

The glass is rated for 58 psi (twice as much as required by heavily carbonated beer.) These bottles are specifically made for carbonated drinks.

Are swing top bottles good for homebrew?

Polished, professional, and nostalgic, glass swing top bottles are perfect for those who aim to give homebrew as a gift or just have great style. These bottles may be reusable and self-capping(thanks to the swing top), but they are glass, so they aren't necessarily durable as they'll break when dropped.