Turn bathroom towels into an all-in-one beach mat and tote bag. Start with 1 hand towel and 1 bath towel in the same color (length of hand towel should equal width of bath towel).
For handles, sew a 3-inch section from each end of a 21-inch length of webbing to center of 1 long side of hand towel. Repeat on 1 short side of bath towel. Place hand towel on bath towel, so handles are aligned and facing. Stitch towels together along 1 long edge of hand towel, leaving sides with handles open.
To form sides of bag, stitch along short sides of hand towel, 4 inches in from edges (or along decorative stripes), creating a pocket. Flip inside out, and tuck length of bath towel into pocket. At the beach, turn inside out, and unroll the towel to use as a mat. If you prefer, stuff the pocket with a soft item to make a pillow.