We tend not to throw towels away- they just get relegated from bath towels to swimming towels to outdoor swimming towels to dog towels etc.
Current oldest towel is one that DH (nearly 50) had as a child and not even as a best towel but as a swimming towel. We inherited it from MIL and I keep meaning to recycle it but it’s actually quite useful. It’s probably 60 years old.
Anyone else have very old towels lurking in their cupboards?