A dry box is a good option but it also depends on various factors. For one, if you have expensive lenses and many camera bodies, then a dry box is a must. Another factor is how rich you are.    There are other pros and cons in the guide.

I am still using my DIY dry box with the thirsty hippo. I think I can stretch the usage of the thirsty hippo to at least 3-4 months (and I'm opening my box almost everyday). In terms of cost, DIY dry box is cheaper but in the long run (over many years), the dry box is a better alternative.

Here's my calculation on the cost:

My DIY container : RM25
Thirsty Hippo x1 : RM16 (price in Sibu, can last for say 3 months)
- that makes it RM16 x 4 = RM64 per year

Use thirsty hippo for 5 years = RM64 x 5 = RM 320

Total cost after 5 years = RM320 + container = RM345

That's about the same price as a small dry box (dry box power consumption is about 3-5w, so not much electricity overhead). However, if your dry box failed, then have to send in for warranty or pay for the repair if no warranty.

By 5 years, I'd probably buy a new DSLR, maybe Sony alpha 2550!!! 

So for me, I'll stick to my DIY dry box for the moment.