Gadgets are always a solid go-to for holiday gifts. With so many flooding the market, though, it’s hard to know what’s useful and what just takes up space. To help with your holiday prep, local businesses weighed in on the top tech gifts for your friends and families interests. Sometimes you can’t commit to drinking a whole bottle of wine in just a few days. To taste a great wine without ruining the whole bottle, Lee Carlo, the wine manager of Natick’s new Total Wine, suggests the Coravin.