With the often-close quarters in a travel trailer, knocking a glass off a shelf or table is always a concern. I used the dimensions of all of the types of cups and glasses that we have in our RV for wine, water, coffee, etc. and created a holder that attached to the shelf under the window between our two lounge chairs. This design safely holds all styles of drinkware, and we no longer have broken glasses. The top shelf bows out in the center far enough to support a bowl of snacks.
Darryl Steeves | Calgary, Alberta