Deep Heat Bath Tonic One measure in hot running water and you have a foaming tonic for aching limbs, a pick me up for sore muscles and joints. And that gentle fragrance is not just cosmetic, it's aquatherapeutic. Deep Heat Bath Tonic contains oils of juniper, eucalyptus, patchouli and thyme to soothe and help overcome that feeling of fatigue.It relaxes, restores and revives. contains natural Juniper, Eucalyptus, Patchouli and Thyme oils. provides comfort in a warm bath. Deep Heat Bath Tonic is a gently fragranced, foaming bath tonic,perfect for soothing sore muscles and aching limbs.