On ours, the toppers on each end have 2 rubber stoppers on the bottom so that the top won’t just slide off the table. I believe they’re also magnetized.
Make sure you have enough clearance for any items you want to store in the table, and that they won’t intersect with the stoppers if you add those.
Thank you so much! As someone with oral allergy syndrome, I can’t have some spices and it really makes dishes bland. I’m looking forward to trying these!