I suffered from hyperhidrosis my entire life, and I am constantly looking for the best product to control my excessive sweating. Two weeks ago I bought Carpe Antiperspirant Hand Lotion. It's small and compact enough to fit inside my purse without it taking up too much space. I can say it is really effective. The only time it doesn't work is when I got really nervous, but that doesn't happen often. Downside is that it stops working after a few hours, probably around five hours.
Also when applying it, sometimes there is a white cast on your skin that makes it appear ashy and may get a little sticky, but that means there's a little too much product. After washing my hands, the cast and the stickiness is gone but the product still works.