There's a gift with purchase offer from Biotherm running at The Bay through February 3. With any Biotherm purchase of $40 or more you'll get a Biotherm Blue Therapy Serum (10 mL) and a Skin Vivo Serum (5 mL). They have a combined value of $27. The offer is available online and in-store. If you're shopping online, the gift will be added to your cart automatically when you meet the minimum purchase requirement.