Cotten - tablecloths, placemats, or cloth napkins, bed or bath linens, beach towels, bathrobes, hammock, quilt.
I think a paper envelope filled with paper money ( ones, fives, tens, twenties, etc. or a combo) and a paper ticket or gift certificate. Could add a paper picture in a frame all placed in a gift box wrapped in beautiful paper.
Bedding, linens, his n her robes are all great options. How very sweet of you to gift them every anniversary!
My hubs gave me a Dreamlines sketch of my dress. Coolest gift. We plan on keeping to the tradition of the gift for each year. I think it is such a fun idea.
A monthly magazine subscription; the gift that keeps on giving! 12-months of Food & Wine / Vanity Fair / Wine Spectator / Travel & Leisure/ Nat Geo etc.