Magnetic shot glass attachments are popular for stability.
Some sellers offer folding skis with hinges for easier travel. DIY Shot Ski: Kits and Materials shot ski buy
For those wanting a personal touch, making a shot ski is a common DIY project. Go to product viewer dialog for this item. Magnetic shot glass attachments are popular for stability
Mark and Graham provides a 60-inch, 4-person option, which is often Monogrammable. Customization Options which is often Monogrammable. Customization Options