Amazon.com: Bamboo Shower Stool Bench Waterproof with Storage Shelf for Shaving Legs or Spa Bath Seat in Bathroom & Inside Shower for Adults Seniors Elderly (24 x 13.4 x 18.5 inches+Black) :
10 Best Waterproof Outdoor Storage Benches - Foter
How to Build an Outdoor Bench With Storage (DIY) | Family Handyman