Not only is this GLO Science GLO Lit Teeth Whitening Tech Kit ($120, originally $149) on sale now, so is the Extra GLO Teeth Whitening Device Mouthpiece and Case ($68, originally $85) if you're looking to share.
Plus, there are refills to use with the device or on teeth by themselves in a 3 Pack ($20, originally $24), 7 Pack + Lip Care ($40, originally $49), or 10 Pack + Lip Care ($52, originally $65), too.