Is a wishing well acceptable?

Wishing wells are becoming more popular, particularly as brides and grooms are increasingly living together before their wedding.  This means they already have toasters, crockery, glassware and many of the other traditional wedding gifts.  In this case a wishing well is a sensible alternative.  However, some guests will feel unsure about how much to contribute.  If they ever need a suggestion the cash value of a gift they would otherwise have purchased is usually appropriate.  Older people may find this more difficult.  Nevertheless, a wishing well can be a practical alternative.