Sturdy X- Pen Recommendations?

I have a 10 week old Labrador puppy who I have been keeping in an x-pen while I am at work. She has a sitter who comes during the day, so she is never in there for more than a few hours, but she still does occasionally get restless and has recently figured out that she can jump against the sides of the pen and it will lose its shape and travel across the floor a little bit. It’s connected to her crate so it doesn’t travel super far, but the x- pen isn’t the most sturdy and she can get closer to whatever she is interested in. I have it set up in our kitchen on hardwood floors, so I can’t secure it with stakes it came with. I had the idea to buy a bunch of dumbbells and zip- tie them to the bottom of my current x- pen, but I don’t know how well that will work and thought if there are actually quality pens out there, then that would be a better option.

All that being said, I’m wondering if anyone knows of any good x- pen brands that are actually sturdy and will stand up against a growing Labrador puppy jumping against the sides!